MAF Sensor issue

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10-12-2003, 10:57 AM

maxima_million

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MAF Sensor issue

I checked the ECU and got 0102 - Mass Air Flow Sensor. I then checked the wires from the top of the engine and it looks fine. All connections seem to be made. The only thing I did recently over the summer was to clean the throttle body and never got an error code afterwards so I'm ruling that out as a cause. What else could I check to make sure it truly is the MAF sensor? I don't have a voltmeter but if I got one, how would I use it to check?

Thanks in advance!

10-12-2003, 11:01 AM

Kevlo911

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This malfunction is detected when an out-of-range voltage is sent to the ECM. That voltage might be too high or too low.

a) An excessively high voltage from the MAFS is sent when the engine is not running.
b) An excessively high voltage from the MAFS is sent under light load driving conditions.

Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Faulty MAFS

c) An excessively low voltage from the MAFS is sent when the engine is not running.
d) An excessively low voltage from the MAFS is sent under heavy load driving conditions.

Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Intake air leaks
- Faulty MAFS

With DTC 0102 the ECM is supposed to switch into Fail Safe mode and limit engine speed to 2400 rpm.

search for hte maf sensor ground mod

10-12-2003, 11:09 AM

maxima_million

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Thanks for the info. You would not happen to know any issues arising from doing the MAF sensor ground mod? Could I mess anything else up since the MAF has input to the air/fuel mixture?

10-12-2003, 11:13 AM

Kevlo911

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no it won't mess anything up, all you are going to do is re-do the ground to the maf sensor

also clean ur maf sensor with rubbing alcahol and a Q-tip

after all that reset ur ECU

10-12-2003, 11:20 AM

maxima_million

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How would I clean the MAF Sensor? I'm asssuming if I disconnect it from the air filter housing, I clean a sensor on the inside? Or the black square on the top?

10-12-2003, 11:22 AM

maxima_million

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Oh yea, I should add that the car has no problems (RPM limitations) since I got the error code. I'm assuming again that it's a false reading.... hopefully a simple cleaning will fix it!