2003 Chevy Trailblazer 6 cyl Four Wheel Drive Automatic 175000 miles
2003 Chevy Trailblazer-high miles well maintained. Reduced power light started coming on in January this year. Popped codes P1271 and sometimes P1275 and I replaced the accelerator position sensor. It is an intermittent problem where as it will not come on for a few days, then all of a sudden on a cold start it will come on. Shut off restart and comes on for three consecutive start cycles then fine. The TB runs fine no other issues but this code p1271 and reduced engine power light. Seems to do it primarily on a cold start. Replaced the throttle body and had GM dealer update the PCM with the newest software. Tried jiggling all of the connections to make the fault appear, but no luck. Everything looks intact. There was also a code for the camshaft position sensor and I replaced the sensor-code has not appeared for the CPS since replaced at the same time as the accelerator position sensor. Any ideas on where to look next?
Saturday, May 16th, 2009 AT 9:48 PM