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Re: Code P1131 Posted by Doug W [Email] (#2371) [Profile/Gallery] (more from Doug W) on Thu, 11 Oct 2012 20:13:24 In Reply to: Code P1131, CraigU, Thu, 11 Oct 2012 15:09:34 Members do not see ads below this line. - Help Keep This Site Online - Signup |
According to the WIS: O2 Sensor #1 lean. Closed loop blocked in rich mode for more than 35 combustion cycles. Sounds like the Trionic system is trying to richen up the combustion mixture. O2 sensor could be bad but not likely. Could also be a vacuum leak - much more likely. The PCV system on the '04 is pretty complex. Check all the hoses, especially one that runs along the back side of the valve cover and has a white damper in the middle of it. The hose runs down between intake runners 3 and 4 to an air oil separator box on the back side of the engine. Very common for this hose to break where it meets the damper.
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_______________________________________ '03 Aero 5Spd, Krona, 290 bhp (son's) Sold: '04 Aero Sport Kombi, Sport Tek, BSR '03 Linear 5 spd. Krona Mods, 350 bhp
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