P0101 and P2188 codes

hu5ker555 · Post by **hu5ker555** » 28 Dec 2016, 06:08

CEL comes on periodically with these two codes. Then it goes away, then comes back. Car is running OK, steady idle, good power.
Suggestions? I already cleaned the MAF, but the codes eventually come back.

Post by **vtl** » 28 Dec 2016, 08:33

What car is it?

Cleaning MAF does nothing, you need a new one. Car runs fine, because ECU sees it can't rely on MAF sensor reading and switches to preprogrammed values. It injects more gas to keep cat.converter cool.

hu5ker555 · Post by **hu5ker555** » 28 Dec 2016, 08:59

Sorry...2005 S60 2.5T
Do I need a special tool to remove the security torx screws?
Any suggestions on where to get a new MAF?
My next step was to smoke test it with a cigar.

Post by **vtl** » 28 Dec 2016, 09:05

https://www.fcpeuro.com/products/volvo- ... 0280218088

or, if you like blue boxes

https://www.fcpeuro.com/products/volvo- ... 0-31342414

You can also start with a used MAF.

A hole in intake would cause an uneven idling and a LEAN fuel mixture.

hu5ker555 · Post by **hu5ker555** » 28 Dec 2016, 09:35

Thanks for your responses. So, a P2188 code would not be caused by a vacuum leak?

I saw some MAF's available on ebay for about $20. Maybe I'll start there.

Could it be a dirty throttle body?

Post by **vtl** » 28 Dec 2016, 09:37

P2188 is a too rich air-fuel mixture, not lean. Vacuum leak == lean mixture.