986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

ChrisZang · 02-23-2007, 02:26 PM

I doubt that it's the MAF.

The P1129 applies to only ONE cylinder bank, if the MAF were bad you'd probably have errors on BOTH banks.

P1129: Oxygen Sensing Adaptation Area 2 (Cylinders 4 - 6) - Lean Threshold
so it could as well be a bad O2 sensor (or the obvious: gas cap, oil cap)

here is some good reading:
http://www.renntech.org/forums/index.php?showtopic=7558

I just had a P1128 fixed by replacing the oil filler cap which had a leaky rubber seal and was drawing air ...

How many miles do you have?

02-23-2007, 02:26 PM	#2
ChrisZang Registered User Join Date: Mar 2006 Location: San Carlos, CA 94070 Posts: 1,450	MAF or no MAF that's the question I doubt that it's the MAF. The P1129 applies to only ONE cylinder bank, if the MAF were bad you'd probably have errors on BOTH banks. P1129: Oxygen Sensing Adaptation Area 2 (Cylinders 4 - 6) - Lean Threshold so it could as well be a bad O2 sensor (or the obvious: gas cap, oil cap) here is some good reading: http://www.renntech.org/forums/index.php?showtopic=7558 I just had a P1128 fixed by replacing the oil filler cap which had a leaky rubber seal and was drawing air ... How many miles do you have? __________________ I still wave at Boxsters, but they no longer wave back :-( 2002 Boxster S "Violet" (sold but not forgotten) 2009 Carrera 4S "Kelsey" (current ride) 2015 FIAT 500e "Nikki" my commuter car