s70 help

bluegrasmtns · Post by **bluegrasmtns** » 21 Aug 2008, 13:56

Alright, first post, first problem. 1998 S70 GLT, 150K miles.

Symptoms: Hard to start when cold, now I''ve noticed oil smell in exhaust while idling.

CEL is on. Codes are 02 sensor related, PO136 and PO144.

Ideas on where to start?, I''m worried it''s a compression issue, but car seems to run great. Haven''t noticed any oil or water usage. Fuel economy is great and car runs great. Turbo? Or could it simply be an O2 sensor or fuel regulator?

fushionEdge · Post by **fushionEdge** » 21 Aug 2008, 17:41

o2 sensor probably

Post by **Ozark Lee** » 21 Aug 2008, 18:03

Start with cheap and easy. Grab a can of MAF cleaner at the auto parts store and clean your MAF sensor. Just spray it and let it dry. Don't scrub it (the maf element) or even touch it.

Many O2 sensor codes are as a result of a dirty MAF sensor.

Next thing to check is all of your vacuum lines. A split vacuum line introduces un-metered air into the intake and that to can set an O2 sensor limit code as well.

Those steps will only cost a few bucks and they may solve your problem. Furthermore they can't hurt anything.

...Lee