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MAF cleaning details after 1124/1126 CEL


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I've got repeated, simultaneous 1124 & 1126 (right & left O2 sensor) CEL errors that have been discussed in several forums, plus one instance of the generic P0102 (Mass or Volume Circuit Low Input). Certain discussion threads suggested a first fix was cleaning the MAF. What do you clean? There's the obvious diode-like element on one side; Should you spray into any of the orifices?

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I've got repeated, simultaneous 1124 & 1126 (right & left O2 sensor) CEL errors that have been discussed in several forums, plus one instance of the generic P0102 (Mass or Volume Circuit Low Input). Certain discussion threads suggested a first fix was cleaning the MAF. What do you clean? There's the obvious diode-like element on one side; Should you spray into any of the orifices?

You mean orifices on the MAF :lol: I have read where you spray/soak the whole unit with "circuit board cleaner". To tell you the truth I used the CRC stuff and basically soaked the whole thing (did this more than once) and let it air dry...and it never helped. Once I got the codes (ABS/PCM) the MAF was fried and only replacement worked. Others swear that their car performs better after "cleaning". I have not experienced this...whcih does not mean it doesn't work...just not for me.

Oh yeah....look here:

http://www.renntech.org/forums/index.php?showtopic=414

Edited by wross996TT
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There can be multiple root causes for the codes. The cleaning of the MAF will help clear the codes only if that was the root cause, "dirty wire". If the MAF is toasted, cleaning won't help at all.

When you remove the MAF, look at it from the air flow perspective and you will see the wire, spray that with MAF or electronic cleaner. Let air dry and replace. For me, the codes where caused by the K&N filter. 9 months after I replaced the paper filter I got the code (potentially too much oil in KN), tried the MAF cleaning and it cleared the situation. Has been fine ever since. Cleaning it will cost you about $3.50 for the spray cleaner, so Iwould always do the cheap stuff first. The new MAF can run you $250 (for returned core) or more.

But MAF's do go bad. My old Volvo 240 wouldn't go past 60K miles without a replacement. And that was easy driving, not Porsche driving.

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