Question about 1999 Saab 9-5
P 1181 code- long fuel trim max value air fuel lean.possible causes fuel filter clogged or restricted-fuel injectors dirty or restricted-fuel level too low during heavy acceleration events- fuel pressure regulator has failed.not supplying enough fuel- water or alcohol in fuel causing low 02 sensor signal during acceleration.
Posted on Jun 27, 2009
P1181 and p1171 is caused by air mass sonsor, after changing the sensor the car runs perfect and for some reason the third gear is no longer sliping.
Posted on Dec 02, 2011
Had a guy tell me it was either an o2 sensor or the MAF sensor, or a vacuum leak it would cost about a hundred dollars or so to diagnose. (Same guy that inspected the car about a week before the engine light came on). I figured if it was a vacuum leak, I might be able to find it myself... I did. SOMEONE had loosened the evap test port in the rear-passenger side of the engine compartment. Not going back there.
Posted on Aug 17, 2010
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Posted on Jan 02, 2017
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