how to reset check engine light after replacing mass air flow sensor

Before we jump into the diagnostic lets take a look at how the MAF sensor works so the procedure makes sense to you. Switching the ignition on and off is also one method of hard reset without disconnecting batteries.

Top Reasons Your Check Engine Light Is On

Restart engine and let it idle for at least 5 seconds.

. Put the keys in your ignition and turn your ignition on and off consecutively after a second in each step. Only show this user. Sometimes an O2 sensor fails and you need to replace it.

Check engine light on for mass air flow sensor after already replacing. DiY Cleaning Of MASS AIR FLOW SENSOR and AIR FILTER replacement - MOST COMMON CHECK ENGINE LIGHT PROBLEM - Attention - ONLY USE _. If this helps we then know it is a fuel problem.

This needs to drain. A auto shop told me that one of the check-engine codes was for the mass airflow sensor. Once it is done see if the engine check light is still coming on or not.

Resetting the cars computer and ensuring all codes from the sensor are synched with the computer. Tried replacing the spark plugs and the air mass flow sensor but the problem still persists. Your trying to drain all the power the car still has stored inside it.

Once youve replaced your vehicles O2 sensor youll need to reset the ECU so it can properly gather information from the new O2 sensor. Reset code and drive vehicle. I have a 2015 Nissan Sentra SR and a while back the check engine light came on and read code P0101 for mass air flow sensor.

Check engine light on for mass air flow sensor after already replacing. The greater the difference between them the greater the probability that you have a bad mass air flow sensor. The mass airflow sensor is a key sensor in your car.

The ECU then adjusts the air-to-fuel ratio to optimize the fuel combustion. If check engine light code P0172 persists after you have inspected the air intake system and cleaned the Mass Air Flow MAF Sensor perform a fuel pressure test. That brings up the question of can your car run without the mass air flow sensor.

The reason you need to do this is for the car computer to reset to its factory setting and forget previously learned parameters. When that has been done. Replacing the affected sensors is the best solution.

Turning the Ignition On and Off. I bought a 2004 X3 recently and even though the Check Engine light was not on I did buy a can of Mass Air Flow sensor cleaner and cleaned the MAF. The mass air flow sensor can run from about 250 for a V6 to 500 for a 4 cylinder Hyundai parts and take about a half hour to replace.

April 1 2022. When you change a MAF sensor you need to disconnect the battery for about 10 minutes so the computer forgets the learned parameters and resets to the factory parameters. Once you replace your mass airflow sensor you will have to disconnect your car battery for some minutes I recommend 10 to 15.

The resulting lines should be similar increasing and decreasing simultaneously. The transformation was remarkable - the engine seemed to pull with. Check if the engine light is still on after the Mass Air Flow Sensor was replaced.

If your check engine light is off Your ECU has reset. If you drive around without reseting the computer might figure it out after 30 miles. 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.

Check for air leaks on or around any intake pipework using a good spraying of carb cleaner if the engine surges then thats the leak. The entire system can be reset by unhooking the battery and leaving it unhooked for 10 minutes. The engine still drove like it was a bit breathless so I bit the bullet and bought a brand new MAF sensor.

Up to 25 cash back When you step on the gas and the engine rpm does not increase try having someone spray starting fluid into the intake. Gently accelerate and decelerate the engine. It could be as simple as your gas cap not being on tight or leaking.

Capacitor and resistors still retain power after the battery is disconnected. I replaced my mass air flow sensor on my nissan sentra 2011 sr but the check engine light came back on they told I have to reset the sensor. Hence when some codes are not in sync with the vehicles computer you will have the check engine light showing up again.

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. You need clear access to the mass air flow sensor housing without removing it from the vehicle. Keeping the battery unhooked for.

Up to 8 cash back My car has 129000 miles. Cost of replacing A Bad mass air flow sensor. A replacement mass air flow sensor can cost anywhere from 20 to 600.

Then it goes into learn mode and may take a little while before it learns all the parameters of the new MAF sensor. Posted on Feb 09 2010. You can attach your cables back and turn your car on.

You can take of the ground of the battery of the car for 30 minutes and the computer will reset. Also I would rec to check the air snorkel from the. How long does it take check engine light to go off.

The codes are an essential tool in helping a technician detect a problem with the MAF sensor. Your car has a lot of sensors and this is just one that helps your car run properly. Air filter spark plugs oil filter are all new.

Basically the MAF sensor measures the amount of air flowing into the engine through the air cleaner assembly which contains the air filter and connects to the throttle body. How the MAF Works. I went and replaced the sensor and then cleared the code.

In this article we will look at what happens when you disconnect the mass airflow sensor.

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