Your O2 sensor is a "part that is designed to wear out". I have not had a problem with the truck since the fuel pump was replaced. A bad mass airflow sensor causes the engine computer to lose the ability to calculate the appropriate amount of fuel to inject. Check Engine Light after New MAF Sensor Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. I have a 2001 Corolla Check engine light comes on I drive to dealer, an O2 sensor was replaced, before I got home 70 miles, the light comes back on, the dealer now says it is the mass air flow sensor, but will not give me adjustment for o2 sensor. When replacing a mass air flow sensor it is good practice to replace the air filter at the same time. However, it is important to note, that this sensor should only be changed after replacing the mass air flow sensor or ruling it out as a possible cause and fixing any air or vacuum leaks under the hood first. In order to know the correct amount of fuel to pump, the engine must know how much air is coming in. Many types of problems may cause this light to come on, so you must have your car’s computer analyzed to see if the light is related to the mass airflow sensor. Also I havent changed my aif filter in such a while it is kind of dirty. mass air flow sensor 25 Answers. Mass Airflow Sensors. If you also notice on your dash, in addition to the activated check engine light, that you have low oil pressure or your Mercedes-Benz is overheating, you should safely pull off the road as soon as you can and shut off the engine. Save big on Air Filters & Intake Systems with JC Whitney! We have a wide selection of replacement & aftermarket products. Symptoms of a bad mass air flow sensor include decreased fuel economy, starting trouble, stalling shortly after starting, rough idling, and jerking during acceleration. The (MAF) mass air flow sensor measures the volume and density of the air entering the engine. If it does, it needs a new one. I can't even begin to tell you how many perfectly good sensors I've seen replaced for a rich/lean code, or as a cure to a service engine light that comes and goes. This means that more than one problem could be causing your check engine light to illuminate. I guess that the Mass Air Flow sensor may be coated or need to be cleaned up. If there's no leak, the sensor needs to be replaced. maf sensor was replaced in 09 cobalt but still not running right and still throws a mass air flow code - Chevrolet 2009 Cobalt question Search Fixya Press enter to search. mass air flow sensor 615. Trouble code P0171 may mean that one or more of the following has happened: •Your Toyota's MAF (Mass Air Flow) Sensor is dirty or defective. In many instances, stalling ends up being an idle control motor at its limit or a failed motor. When the light turns on, drivers may not realize what the issue is. However Check Engine Light came back. However, it is important to note, that this sensor should only be changed after replacing the mass air flow sensor or ruling it out as a possible cause and fixing any air or vacuum leaks under the hood first. you ME monitors the fuel and air via mas air flow and injection pulse width and the o2 sensors. I have not had a problem with the truck since the fuel pump was replaced. In addition, a problem with the Mass Air Flow sensor often causes the "check engine" or "service engine soon" light in the vehicle instrument panel to illuminate. Idle problems seem to go away when maf sensor is disconnected. A problem with the Mass Air Flow sensor often causes the “check engine” or “service engine soon” light in the vehicle instrument panel to illuminate. The most common bad mass air flow sensor symptoms are: 1. Sometimes an O2 sensor fails, and you need to replace it. 3L CC and in an attempt to upgrade the headlights I foolishly unplugged the air flow sensor while removing the air filter cover and box. If you do not replace the filter, the mass air flow sensor can also be damaged. The OBD-II code P0101 is set when the signal from the mass air flow sensor is out of expected range, or in other words, the MAF sensor doesn't work properly. In most cases, this code is not very difficult to diagnose. Fact is, when oxygen sensors were first being used, they did tend to fail. Put the airflow sensor from the 87 into the 91 (the 87 has ZERO codes and works great) and now, still same code and same problems when driving. Replaced ignition coils, mass air flow sensor, oxygen sensor, and spark plugs multiples times to try and fix the check engine light that keeps coming back on. mass air flow sensor 25 Answers. I have been trying hard to do that to really clean it properly. Of course we had to order the part in, so it was Wednesday before my husband could install it, along with a new air filter. Why does the check engine light stays on after replacing the egr o2 sensor mass air flow and catalytic converters? They will still work with no converters. They were not 100% sure what was wrong but suggested it was the Mass Air Flow Sensor. If in doubt, run engine at 2000 rpm for 2 minutes. I have a Mk4 GTI 1. The mass airflow sensor tells the car's computer to add the proper amount of fuel based on the air coming through to the engine. In other words, a corresponding air mass produces an exactly defined voltage signal. Last cleaned at 120K miles, Now, at 136K miles, the check engine light came on with codes P0172 (system too rich) and P0101 (mass air flow circuit). Also I havent changed my aif filter in such a while it is kind of dirty. For a complete wiring diagram Refer to Section 8W. Does anyone have any suggestions as to what it can be?. First check to see what codes are being set which cause the Check Engine light to illuminate. Under these conditions the signal frequency must be between 1. P0103: Mass Air Flow (MAF) Circuit High Input. The car starts perfectly but as soon as it reaches 3000 r. Malfunction indicator light on dash came on. The MAF sensor g/s parameter should change smoothly and gradually as the engine speed is increased and then returned to idle. In addition, the Service Engine Soon light has not lighted up despite of engine stalling. Passat MAF, problems with the MAF sensor, Mass Air Flow meter Last days, RBK ( Rebe ), my old faithful Volkswagen Passat TDI show some signs of weakness. Because of the number of potential causes, diagnosing a defective mass air flow sensor normally requires the services of an experienced mechanic. FIXD explains symptoms, causes, and severity of P0101. Check Engine Light The most reliable early symptom of a failing or failed MAF is the illumination of the check engine light on the instrument panel. Often this happens when an old or improperly installed air filter allows some unfiltered air into the engine or when oil from an oil-soaked air filter contaminates the air flow sensor. If the code comes back, it may be necessary to replaced the mass air flow sensor. Black smoke is caused by excessive fuel or a lack of air flow (or both) into the cylinder, causing a fuel “rich” condition. To prevent the sensor from malfunctioning, make sure to regularly check the air filters and have them replaced at least once in a year. 2004 E46 325i - Limp Mode and Check Engine light [REPAIR LOG] Hi all, about a week ago I came to a stoplight in my E46 (2004 325i automatic, ~108k mi) and noticed that the transmission warning light and the check engine light came on. A vacuum leak, improperly reading mass air flow (MAF) sensor, wrong or malfunctioning oxygen (O2) sensors can also cause cylinder temperature to rise. Air mass is a critical measurement the ECM uses to calculate fuel injection, and most engines are either equipped with a manifold absolute pressure (MAP) or mass air flow (MAF) sensor. I do not have a code scanner. The mass airflow sensor tells the car's computer to add the proper amount of fuel based on the air coming through to the engine. So I tried some cleaner and reset the. This field 4 in block 002 indicates the airflow in grams per second, measured by the MAF sensor. Changed it with used one same symptoms, bought a new one and put it on same thing. Still gave it 3 stars because it fit perfectly and I don't know if the oil from the K&N air filter could've caused the initial problem. The code they got advised them to remove and replace the sensor. In this guide, you will learn what symptoms you may notice when the mass airflow sensor fails, how to replace the mass air flow sensor on a Mazda and answers to FAQ. When the light turns on, drivers may not realize what the issue is. The (MAF) mass air flow sensor measures the volume and density of the air entering the engine. i had the same problem with my buddy 91. Replaced mass air flow sensor and check engine light still comes on with same code. 8L V6 equipped cars (to be more specific: 89-96). Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. K&N Response to Mass Air Flow Sensor Concerns Every stock replacement air filter we sell comes with this sticker, which we advise consumers to place prominently on their air box. Furthermore, The (MAF) mass air flow sensor also measures the temperature of the incoming air. It got to the point where I bought a new sensor from the dealer and 3 weeks later the light came back on. The parts man grinned and said you need mass air flow sensor. 00 to replace the pump. The cause is often a problem in the idle air control system. Mass Airflow Sensors. The Mass AirFlow (MAF) sensor is usually located between the air filter housing and the throttle. IT was clean except that they don't look shiny as you said. i have a 96 3. The mass air flow (MAF) sensor is an air flow meter that measures the amount of air entering the engine. Replaced air filter and maf sensor. Overlooking the fact that a dirty mass air flow sensor can cause an O2 sensor circuit slow response. Engine Stalls (Check Engine Light May or May Not Be On). Unfortunately, the PCM (Powertrain Control Module = Fuel Injection Computer) is not smart enough to sense a dirty MAF sensor and so you're not gonna' get a dirty MAF sensor diagnostic trouble code lighting the check engine light. Bill's Quality Auto Care Customer Satisfaction Score of 99. I took it to Advanced Auto for a ECU read and it said that the MAF sensor was bad. When the flow of air enters the fuel injection system of the engine, the mass air flow sensor will analyze how much air is flowing in there. I replaced both oxygen sensors and cleaned the mass air flow sensor but after resetting the codes, the light is still on? All my spark plugs were just replaced including fuel filter. If you find the air flow sensor cheaper somewhere else, give one of our US based auto specialists a call and we will match that price, 1-888-907-7225. Q: My dashboard Check Engine light came on and a scan tool said Code P0171 was stored on my car's computer. The fuel filter may be in need of service, but it is not the cause of the problem. After changing plugs problem went away but came back with a vengeance, since I have changed plug wires, cap, rotor, mass air flow sensor, both upstream and down stream O2 sensors(4 total), fuel pump, fuel filter, air filter and have ran several bottles of cleaners through fuel system PROBLEM NOT SOLVED!. Also, I'm going to remove the mass air flow sensor completely and inspect it with a magnifying glass if it looks dirty still ill spray it down some more if not, Ill see what happens with it after the cat and check valves are replaced. since you have already replaced it and many other parts, you are going to have to look for a wiring problem. Other than that, it's difficult to spot a failing oxygen sensor. 2003 Toyota Prerunner 3. I changed the spark plugs, replaced the air filter, cleaned the MAF sensor, and cleaned the throttle body. is there any way a not secure pcv valve could be causing a p1443 check engine code. My 2008 Chevy Colorado started idling rough. Mass Air Flow Sensor code not the problem If this is your first visit, be sure to check out the FAQ by clicking the link above. Replaced my mass air flow sensor, light keeps coming on Engine ligt kept coming on, had it scanned and it was my mass air flow sensor, bought a new one from Jaguar dealer 3 days laters the code came back on. Could it also cause the check engine light to come on because not enough air is going to the MAF sensor. bevel gear re-seal 881. As you will see, the MAF is a very sensitive part. If it is a MAF sensor code make sure you have a good connection at the MAF sensor connector, also;check your engine air intake duct work for external air leaksit has to be sealed. I have a 1999 grand prix gt. its an 01 jetta, after i installed the air intake, my check engine light came on and i got the car diagnotics checked and its reading incorrect air flow, is their something i can do to make it go off so i can get my safety tags put on. The MAF, Mass Air Flow meter is the sensor who indicates to the ECU (car computer) the air mass who flow inside the engine. Chevrolet Silverado 1999-2006: How to Clean or Replace Mass Air Flow Sensor (MAF) How to Clean or Replace Mass Air Flow Sensor (MAF) Air flow metering is vital for your Silverado's engine to function correctly. It helps the car's computer regulate the ratio of air to fuel. Many types of problems may cause this light to come on, so you must have your car’s computer analyzed to see if the light is related to the mass airflow sensor. Idle problems seem to go away when maf sensor is disconnected. maf sensor was replaced in 09 cobalt but still not running right and still throws a mass air flow code - Chevrolet 2009 Cobalt question Search Fixya Press enter to search. A faulty one can increase emissions, cause the car to stall, and. I can't even begin to tell you how many perfectly good sensors I've seen replaced for a rich/lean code, or as a cure to a service engine light that comes and goes. Key on,engine off. In most cases, this code is not very difficult to diagnose. Because of the number of potential causes, diagnosing a defective mass air flow sensor normally requires the services of an experienced mechanic. Replaced my mass air flow sensor, light keeps coming on Engine ligt kept coming on, had it scanned and it was my mass air flow sensor, bought a new one from Jaguar dealer 3 days laters the code came back on. In addition, the Service Engine Soon light has not lighted up despite of engine stalling. Check engine light came on. No engine issues leading up to this, I just figured it'd be a good Sunday morning project. it started 6 months ago, with the check engine light coming on and going off without being reset. He told me that replacing the sensor was an option or another avenue was to first try cleaning it to see if the check engine light stayed on after cleaning. Q: Check engine light still on after cleaning mass airflow sensor. On the road it's less of a problem, but around town the air flow is less and the left foot stays close to the shift lever. is there any way a not secure pcv valve could be causing a p1443 check engine code. The intake temperature sensor is often integrated your mass air flow sensor!. If your check engine light is still on but the engine is running fine, the light will probably go off after a few cycles of driving with the new sensor (on some vehicles this could take as many as 50 cycles of turning the key on and off). Then the engine light came back on and says "Bank 1 running lean". P0100-MASS AIR FLOW SENSOR. The "check engine" or "service engine soon" light comes on when the engine computer detects a fault in one of the components of the emission control system. If the transmission cooler has evidence of transmission hard parts failure, it must be replaced. It is made up of a hot film and is supplied with electric current from the PCM, the temperature of which is also controlled by the latter. The problem: Replacing a mass air flow sensor (MAF) When replacing a mass air flow (MAF) sensor, there are a several factors which have to be considered. The most common symptom of a dirty mass air flow (MAF) sensor is a lack of power. I could move the car on battery power only, but I had several miles to go before the next exit, uphill, so I figured I needed to be towed. mass air flow sensor 615. Check engine light faults relating to the Mass Air Flow Sensor are becoming less common, but do occur. Replaced thermostat. If it does, it needs a new one. Like this comment?. This, however, does not mean you can afford to ignore the check engine light. If your check engine light is still on but the engine is running fine, the light will probably go off after a few cycles of driving with the new sensor (on some vehicles this could take as many as 50 cycles of turning the key on and off). Problems in the EFI can affect other systems, including the catalytic converter, so it's important to fix them right away. I had checked out at Napa auto parts store with machine. The cleaning procedure is simple and inexpensive. Learn the symptoms of an MAS that needs cleaning, and how to clean it. Indicator light still comes on occasionally. The sensor was brand new and only in the car for 10 miles when the code came up again. Car will drop below 1000 rpms and then rev back up to over 1500 like it wants to shut off. In many instances, stalling ends up being an idle control motor at its limit or a failed motor. P0103: Mass Air Flow (MAF) Circuit High Input. Mass Air Flow Sensor Installation Tips; Every MAF Sensor Needs a Breath of Fresh Air. I took it to a shop and Autozone to get the test and both told me it was the o2 sensor after the cat converter. My service engine light came on and i went to auto store and used the computer. You can try cleaning the Mass Air Flow sensor (MAF) using electrical contact cleaner (be careful, it's delicate). The most common bad mass air flow sensor symptoms are: 1. It’s a part of the engine-management system, so your car wouldn’t be able to adjust to changes in altitude without it. In many instances, stalling ends up being an idle control motor at its limit or a failed motor. Should be roughtly 99-101 depending on the weather and altitude. The fuel pump will not signal a check engine light, among a couple of other things. This depends on how bad the car is running. The Ford Performance 90mm Mass Air Meter / Sensor includes the housing and the sensor. Changed the oil at 109,000 miles and the check engine light comes on right after I changed it. Read the codes. I have a 2004 xc 70 and i just brought it in for a check up at a volvo dealership here's the result. Joe has a check engine light came on. Exactly when a filter should be replaced depends on the filter manufacturer. Learn about this problem, why it occurs, and how to fix it. check engine light read codes to show mass air flow sensor. View: Agile enough for the city and tough enough for the country, your RAV4 is everything an SUV is meant to be. The code they got advised them to remove and replace the sensor. These can be cleaned using electrical contact cleaner or mass air flow. Failing Mass Air Flow Sensor. Step #5: Check the Mass Airflow Sensor Any leakages that can be detected by the air flow sensor should be fixed. Air changes its density with temperature and pressure. Began receiving a Restricted Performance (RP) amber light off and on for a few days. Check Engine Light Diagnostics; Computer Diagnostics (Check Engine Light, Air Bag Light, etc. i've replaced the two valves or sensors on the purge line and still had a problem with check engine light. Like any other engine sensor, the mass air flow sensor can fail over time. The code they got advised them to remove and replace the sensor. Hello, For the past year and a half I have had reoccurring problems with my VW Jetta. I have already had the codes read and was told air flow sensor. horrified to be told new part is $150. Difficulty during engine start. The mass air flow (MAF) sensor is an air flow meter that measures the amount of air entering the engine. The check engine light can come on for many reasons, some as simple as the air filter needs to be replaced or something more serious like engine failure from an internal engine component failure. In many instances, stalling ends up being an idle control motor at its limit or a failed motor. Tried Cleaning MAF and New Air Filter - Code came back. If there’s no leak, the sensor needs to be replaced. A vehicle’s mass airflow sensor, or MAF, is the component that measures the flow and density of the air flowing into the combustion chamber. When the mass air flow sensor malfunctions, you can expect to see a drop in fuel economy, bad. The most common symptoms from a bad mass air flow sensor are slow accelerating and reduced engine power. Air Flow and Mass Sensing Devices Air Flow and Mass Sensing Devices: A Mass Air Flow/Air Flow Meter/Speed Density Primer. 3L CC and in an attempt to upgrade the headlights I foolishly unplugged the air flow sensor while removing the air filter cover and box. So I tried some cleaner and reset the. It’s a critical engine performance component, so if it fails or begins to fail, you should have it replaced. Replace Mass Air Flow (MAF) Sensor Replacing the mass air flow (MAF) sensor is the sixth most common check engine light repair in the U. Began receiving a Restricted Performance (RP) amber light off and on for a few days. Symptoms: Suddenly loss of power. Mass Air Flow Sensor Fault - not fixed by new sensor Discussion in ' Cavalier, Calibra, Vectra, Signum, Sintra & Insignia owners forum ' started by pinskerr , Jul 16, 2013. Esc light comes on all the time. Let me start by telling you about my situation. As explained at the beginning of the article, the MAF data is vital for fuel delivery control. I replaced my MAF sensor but even after that, the Check Engine light is glowing. I cleared the check engine light by disconnecting the negative battery cable for about 15 minutes after I replaced the MAF Sensor to see if it would come on again. Malfunction indicator light on dash came on. Check Engine Light ON. It helps the car's computer regulate the ratio of air to fuel. Air mass is a critical measurement the ECM uses to calculate fuel injection, and most engines are either equipped with a manifold absolute pressure (MAP) or mass air flow (MAF) sensor. Mass Air Flow (MAF)Another cause of P0171 and P0174 codes can be from a damaged mass airflow sensor. Hello, For the past year and a half I have had reoccurring problems with my VW Jetta. This time I spared no expense and purchased them at Napa for $56 each. Under these conditions the signal frequency must be between 1. Toyota Tacoma Check Engine Light Due to Bad Air Flow Meter - 55 reports. The air mass calculation is not simple and uses various combo's of MAF and SD inputs depending on engine operating conditions such as current engine RPM. My check engine light came on about a week ago, went to get it tested came up bad for a Mass Air Flow sensor, ordered the part, replaced it. Code P0101: Mass Air Flow (MAF) Circuit/Performance Malfunction. Clean out the interior with a. This, however, does not mean you can afford to ignore the check engine light. The mass airflow sensor monitors how much air enters the engine. The ECU calculates the fueling parameters based on this figure. This is important as it allows your engine to regulate its performance and change the intake of air to keep your engine running in its best condition. The operating voltage range is 9 -7 Volt, and the output voltage of the mass air flow sensor (voltage to the DME control module) lies between O and 5 Volt. If there's no leak, the sensor needs to be replaced. The next day home, after driving it for 50 miles, the check engine light came back on steady again with no noticeable change in performance, just like before. Keeping all these factors in mind when working with MAF sensors, it helps to fix the fault first time, reducing the number of rejected warranty claims and keep your customers on the road. I have replaced my Mass Air Flow Sensor after receiving OBD2 scanner diagnostic code 'P0102' - shortly after buying (used) VW Jetta 2006 TDI. -- I keep reading that is a complaint that Nissan is well aware of but has not issued a. If the check engine light is on, but steady rather than flashing, this means there is an issue, but it's not yet serious. Hi All! A friend of mine also recommended changing the PCV. This list covers the majority of symptoms I've seen on these types of Ford mass air flow sensors: MAF Codes that light up the check engine light (CEL) on your instrument cluster. Code P0102 is mass airflow sernos-MAF voltage low signal. Check Engine Light The most reliable early symptom of a failing or failed MAF is the illumination of the check engine light on the instrument panel. Openbay is an online source that connects you with multiple auto service professionals nearby who will compete for your auto repair and maintenance business. When the check-engine light flickers on your dashboard, don't stall. The most common symptom of a dirty mass air flow (MAF) sensor is a lack of power. Also said that replacement of the computer and sensor resolved the check engine light from coming on but he still gets that split second hesitation in power. Said it was mass air flow sensor. Air mass is a critical measurement the ECM uses to calculate fuel injection, and most engines are either equipped with a manifold absolute pressure (MAP) or mass air flow (MAF) sensor. If so, just because the engine control unit is. This is the ONLY cleaner you should use in case of bad idling. upper engine mount seperated 216. I also changed the connector for the mass air flow sensor. The cause is often a problem in the idle air control system. A careful examination of the duct between the air flow sensor and the throttle body should reveal where the unmetered air is entering. Nissan Altima 2007-2012 Service Manual / Engine control system QR25DE for california / Component diagnosis / P0101 maf sensor Description The mass air flow sensor (1) is placed in the stream of intake air. Check Wiring and/or Connections from/to Mass Air Flow Sensor (G70) Special Notes In MY 1995-2002 (?) in Europe at VW-diesel-cars G70 had the bad reputation of slowly losing his performance, causing loss of power. MAF Sensor. 5 seconds, check Mass Air Flow Sensor. Note that complete DPFE sensor failure is a very slow process, and the check engine light won't come on until the DPFE sensor is pretty much done for. alignment 193. Reset code and drive vehicle. The powertrain control module (PCM) uses the MAF sensor signal in order to provide the correct fuel delivery for a wide range of engine speeds and loads. Check engine light is the most common indicator light that appears on dashboard. C200K, recurring check engine light, no obvious faults, pls help! Discussion in ' Electrics, Vacuum, Ignition and ECU ' started by Silverspa , Jun 7, 2009. The DPFE sensor in the Focus is not very robust, requiring frequent (every 30k miles or sometimes less) replacement or a work around. If the temperature reading displays -30 to -40°F, the dashboard light should show the code P0113, and if the reading displays 300°F, the. The mass air flow sensor is an integral component to the engine and on-board vehicle computer because it controls and measures the amount of air the engine should receive and regulates how much fuel to inject. Of course we had to order the part in, so it was Wednesday before my husband could install it, along with a new air filter. i now have proper pull away, turbocuts in on time and means it. The problem is that when it reaches 3000 r. Help! ATS Advisor: Unlike GM engines where cleaning the mass air flow sensor will give you results, on Fords you have to replace it if you get this codes. I ended up using the entire can as mine was dirty from a K&N air filter being previously installed on. Push out the two plastic tabs shown below. The location of the Intake air temperature sensor is an easily arguable subject due to different locations in a variety of designs. Nissan MAF Fault P0100 Diagnose & Reset Engine Light Autel AL319 The Porsche Network HOW TO RESET CHECK ENGINE LIGHT CODES, 4 FREE EASY WAYS !!! The Dangers Of A Bad Mass Air Flow Sensor. Calculation of the air mass. See if it's working like it should. If you're having idling issues, clean your Mass Air flow sensor, Idle position sensor and the Throttle body with this cleaner Also replace your air filter. Ouch! The check engine light did go off. If you own a 1. This is important as it allows your engine to regulate its performance and change the intake of air to keep your engine running in its best condition. O2 sensor codes are often the most troublesome and misdiagnosed check engine light problems. In many instances, stalling ends up being an idle control motor at its limit or a failed motor. Bosch®Mass Air Flow Sensor (0280218254) Mass Air Flow Sensor by Bosch®. The hot film mass air flow sensor is fitted in the air cleaner housing at the outlet of the air cleaner. Because of the number of potential causes, diagnosing a defective mass air flow sensor normally requires the services of an experienced mechanic. Check engine Light - Code P0101 Air Intake issue. This could be caused by a simple connection problem of the sensor, a wiring connection may be bad or dirty or the. Overlooking the fact that a dirty mass air flow sensor can cause an O2 sensor circuit slow response. When the flow of air enters the fuel injection system of the engine, the mass air flow sensor will analyze how much air is flowing in there. My 2008 Chevy Colorado started idling rough. This article applies to the Chevrolet Silverado GMT800 (1999-2006). Since I just changed a new MAF about two years that costed me $450 for this year model. This list covers the majority of symptoms I've seen on these types of GM mass air flow sensors: MAF Codes that light up the CHECK ENGINE LIGHT (CEL) on your instrument cluster. More heat shielding is needed here. I have driven the car for another few days and it does seem. Reset code and drive vehicle. Usually if is not completely burn out, a good cleaning with isopropylic alchool can do the job. 5 seconds, check Mass Air Flow Sensor. All voltage and resistances. It measures the intake flow rate by measuring a part of the entire intake flow. Regardless of the method you use to perform EEC-IV diagnostics you will always need to peform the following steps. Problems with vehicle turning off seemed to go away but now I have a rough Idle. What could be the problem? When I crank it sometimes it seems like it is idling high when you are stopped and then give it gas,. When the check-engine light flickers on your dashboard, don't stall. Does that make sense?. Openbay is an online source that connects you with multiple auto service professionals nearby who will compete for your auto repair and maintenance business. I have a 2004 xc 70 and i just brought it in for a check up at a volvo dealership here's the result. An over-oiled K&N filter will definitely coat, and, in the long run, ruin your MAF sensor, costing you a $100-$200 part. Find Your Mass Air Flow Sensor. Considerations Why is the MAF sensor being replaced? Is it as a result of a stored fault code which activates the engine management light? 1. The mass air flow sensor (MAF) is located inside the engine compartment and is used to measure the amount and temperature of air that is entering the engine at any one time. Other than that, it's difficult to spot a failing oxygen sensor. Then the engine light came back on and says "Bank 1 running lean". Overlooking the fact that a leaking vacuum line or intake manifold leak may cause erratic O2 sensor voltage readings. A vehicle's mass airflow sensor, or MAF, is the component that measures the flow and density of the air flowing into the combustion chamber. Hello, I have a 2001 Discovery II and I need to replace my Mass Air Flow sensor due to failing inspection for OBD codes P0171, and P0174. This article will show you how to test and diagnose a BAD GM mass air flow (MAF) sensor on all of the early 90 thru' mid 90's Buick, Olds, Pontiac 3. – Over advanced ignition timing – Excessively lean air fuel mixture (defective oxygen sensor, MAP sensor or Air Mass Sensor) PRECAUTIONS, TIPS, and NOTES If the engine is due for a tune up it is wise to perform preventative maintenance prior to spending too much time diagnosing the emissions problem. Like any other engine sensor, the mass air flow sensor can fail over time. So I tried some cleaner and reset the. Also, I'm going to remove the mass air flow sensor completely and inspect it with a magnifying glass if it looks dirty still ill spray it down some more if not, Ill see what happens with it after the cat and check valves are replaced. Nissan Sentra Failed Mass Air Flow Sensor May Cause Driveability Issues - 184 reports. In addition, a faulty mass air flow sensor might cause the Check Engine or Service Engine Soon light to come on. ) Electrical and/or Wiring Problems; Diagnose and repair tire pressure monitoring systems; Warning Light Diagnostics; Overheating Diagnostics. Learn about this problem, why it occurs, and how to fix it. The heat generated by the film is reduced as intake air flow through it. I took it to the Toyota dealer, they diagnosed the MAF unit had failed, and replaced it at a cost of $326. First check to see what codes are being set which cause the Check Engine light to illuminate. Just replaced MAF sensor, check engine light is still on - code P1155 - Answered by a verified Toyota Mechanic We use cookies to give you the best possible experience on our website. Service engine soon light is on hook it to a computer it said bad mass air flow sensor. I would like to try cleaning it. Maybe needs fuel injectors cleaned professionally? I think thats a waste of money. Said it was mass air flow sensor. -- I keep reading that is a complaint that Nissan is well aware of but has not issued a. The mass air flow (MAF) sensor is an air flow meter that measures the amount of air entering the engine. anyways, about 3 days later Check Engine Light came on. It tucks as close to the engine as possible, and there are small heat shields attached, but still enough heat gets to the rider's leg to make cooking possible on the left shin. Shake the IAT sensor connection to the mass air flow sensor, and check to see if there is any difference in reading. Began receiving a Restricted Performance (RP) amber light off and on for a few days. Since this time the light has come back on a bunch of times, every time saying its the air/fuel sensor. Removed thermostat found that it was not closing all the way. Shop safely with us online or call 888-844-3393 and buy the quality part your car or truck needs today.