Hot film mass air flow sensor - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 09-13-2012, 07:00 AM Thread Starter
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Hot film mass air flow sensor

I have an issue with which i can expect some help from here.
I am working on a Mercedes C200 Kompressor.
The issue i am facing is that the Check Engine Indicator lamp keeps turning ON.
I connected Star Diagnosis and performed the Short Test. It showed an error with the Hot FIlm Mass Air flow sensor.
I checked the HFMAF sensor and the specified and actual values after the test were same and it showed the sensor was fine.
I erased the fault memory.
But even then the Check Engine Indicator turned on after about a day.
Any ideas what might be wrong??
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post #2 of 3 (permalink) Old 09-13-2012, 07:36 AM
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What exact codes is the Star giving you? When mine was bad I had a P0170 from my OBD2 scanner.

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post #3 of 3 (permalink) Old 09-13-2012, 09:50 AM
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Knowing the MY would be helpful.
MAF sensors are pretty much consumable, just like spark plugs. Nobody cleans and reinstall spark plugs.
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