I have a 2001 Saturn SL1 SOC and recently my SES light started coming on and off irregularly, showing a P0410 code. The SAI system works great (all lines ok, check valves operational, etc.) But kicks on sometimes when I come to a stop, especially after getting off the highway, causing the light to come on again. I have replaced the TPS, IAC valve, MAP sensor, the pre-CAT oxygen sensor, engine coolant temp. Sensor, the battery, and cleaned the throttle body and exhaust manifold. The car idles low (500 RPMs) when warm. Is that normal or related? Any ideas on what to try next?
Sunday, November 21st, 2010 AT 11:31 PM