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

Remove the clips securing the air filter housing and lift out the air intake tube. If your check engine light is off Your ECU has reset.

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Erase the DTC memory.

. Not resetting the cars computer ECU. In the service or maintenance options you should have the option to reset the MAF sensor settings. Check Engine Light appearing on the dashboard.

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. The Check Engine light will blink then shut off. Wait five minutes and reinsert the fuse.

Pin on GM SAFARI. Resetting the Mass Air Flow Sensor by Idling the Engine. Stop engine and reconnect mass air flow sensor harness connector.

A replacement mass air flow sensor can cost anywhere from 20 to 600. Asked by Visitor in Cedar Park TX on December 06 2018. You dont reset the sensor you reset the ECU that is monitoring the MAF.

Answer 1 of 2. A auto shop told me that one of the check-engine codes was. Pull out the air flow sensor and clean it properly.

Vehicle may idle rough and stall. After the engine cools down you can go to the mass air flow sensor location and remove the connector from the sensors harness. 12 people found this helpful.

Up to 8 cash back First check to see what codes are being set which cause the Check Engine light to illuminate. This problem may or may not be caused by the mass airflow sensor. There are many possible causes for the Check Engine Light to come on besides the mass airflow sensor.

Replacing the affected sensors is the best solution. One of the most common causes of check engine popping up after MAF sensor replacement is having a faulty replacement. Check engine light on for mass air flow sensor after already replacing.

If it is the MAF and cleaning it was unsatisfactory it will be need to be replaced. Then it goes into learn mode and may take a little while before it learns all the parameters of the new MAF sensor. 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.

A bad mass air flow sensor will usually trigger a check engine light. Turn off the engine and let it cool down if youve been driving. If you dont have any contact cleaner on hand using WD-40 or another.

Next spray a small amount of contact cleaner into the electrical connector. The most direct way to do it is to use a scan tool to access the ECU via the OBDII interface. Heres a general guide on how to do it.

Answer 1 of 2. Mass air flowcheck engine light. You now have to take the MAF out to clean it.

This will indicate that your ECU has been reset. It will be near the intake manifold or throttle body and it will likely have a large electrical connector going to it. Keith December 24 2018 640pm 2.

There is a sensor on the air intake called the mass air flow sensor. Use a flathead screwdriver to unfasten the air intake hose clamp at the throttle body. Drove car for 10.

Idling The Engine. First locate the MAF sensor. You now have to take the MAF out to clean it.

First to cool your cars engine down you need to turn it off. Resetting the Mass Air Flow Sensor by Disconnecting the Battery Remove the old MAF sensor and replace it with a new one Before you connect the sensor with its harness disconnect the battery from the ground cable Leave it like that for around 10 minutes The whole system will be reset now. Tried replacing the spark plugs and the air mass flow sensor but the problem still persists.

This is because the ECU will detect an out of range value coming from the MAF sensor and the check engine light is its way of letting you know that something is wrong. Turn the ignition to the On position but dont crank the engine it wont start anyway. The mass air flow sensor on your nissan d21 pick up has three wires attached to it.

This is very important if you have just used the car. Then vacuum out all dustdirtdebris found inside both halves of the air filter housing. Keeping the battery unhooked for longer than 10 minutes wont hurt.

When replacing the sensor especially at home most people do not accurately make the replacement causing the check engine light to appear again. Check engine light on for mass air flow sensor after already replacing. Check engine light on for mass air flow sensor after already replacing.

If you need to replace it with a new one install the new sensor instead of the old MAF sensor. Remove the connector with the harness of the sensor. Had it diagnosed as running to lean sensor bad.

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