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Old 05-03-2021, 07:01 PM   #1
Corben
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Will a faulty MAF sensor always spark a check engine light?

My 2012 sedan has some acceleration hesitation, a lot like whats is described for a bad MAF sensor. But my check engine light is off.
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Old 05-04-2021, 09:01 AM   #2
WeeYari
 
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There is a difference between a faulty maf and a dirty maf. A dirty one can affect performance but not trigger a code. Cleaning is easy. Do it and see what results.
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Old 05-04-2021, 11:57 AM   #3
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Old 05-04-2021, 01:56 PM   #4
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Check your throttle body and see how dirty it is.

Also I would be at live data such as fuel trims and maf air flow at idle to get an idea of it being a maf issue or not
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Old 05-05-2021, 02:38 PM   #5
Corben
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Thank you for thr tips. I already cleaned the throttle body and picked up some MAF sensor cleaner. I give it a shot this afternoon.
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