How long does the comp take to reset(MAF) change - Mercedes-Benz Forum
 
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#1 (permalink) Old 05-25-2005, 09:06 PM
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How long does the comp take to reset(MAF) change

Fellas:
How long will it take for the computer to detect the new MAF?
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#2 (permalink) Old 05-26-2005, 09:22 AM
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RE: How long does the comp take to reset(MAF) change

I assume you mean you had a check engine light, determined it was the MAF, have replaced or cleaned it, and now you want to know when the CE light will go out, assuming the problems is resolved? The answer to that is approximately 20 start-up/shut-down cycles of the engine.

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#3 (permalink) Old 05-26-2005, 06:48 PM
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RE: How long does the comp take to reset(MAF) change

IIRC, it took less than 6 starts to clear the Check Engine light on the 98ML when I changed it last year.

Dealer said I had to come by for a "reset" / reboot but I didn't have to do that. The car has been into the dealer twice since the MAF swap, and definitely on the OBD last month to check the failed crank sensor. No fault codes came up.

Oh, I bought the MAF new off eBay for $125 and it took less than 15 minutes for the re & re. Dealer quoted $900 including 2.5 hrs labor!!!

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#4 (permalink) Old 05-26-2005, 07:33 PM
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RE: How long does the comp take to reset(MAF) change

When I changed my MAF my service tech just reset my comp and my check engine light went off right then and there.

Good deal jang My MAF was 350.00+ 60.00 for labor=410.00 for the whole job, which was still cheaper than the dealer.
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#5 (permalink) Old 05-27-2005, 10:44 AM
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The magic number was 3

Fellas:
After 3 starts the light was gone[:D]
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#6 (permalink) Old 05-31-2005, 01:34 PM
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RE: How long does the comp take to reset(MAF) change

Keep in mind that a MAF failure is not necessarily “absolute�. It can begin as an intermittent problem and only registers one fault under a certain condition (i.e. RPM, ambient temp and humidity combination). If this is the case, it’s possible that you could restart the engine 15 more times without a fault, then replace the MAF, and it would only take 5 to clear the error code.

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#7 (permalink) Old 05-31-2005, 06:26 PM
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RE: How long does the comp take to reset(MAF) change

When I replaced my mass air flow, it took three on-off starts to clear the code from my computer. An on-off start is usually classified as a start and drive for about 10 minutes each. The computer has to make sure that theproblem has been corrected before it will clear it.
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