SERVICE ENGINE SOON LIGHT

1995 GMC Van

Tiny

benjimo

June, 6, 2011 AT 12:54 AM

My 1995 GMC Rally van with a 5.7 and auto tranny has a SES light on. I tried to pull codes with a paper clip from B to A on the 12 pin obd 1 clip with no luck. Idles up and down and feels like tranny is starting out in second gear unless I manually shift to first. Vehicle speed sensor maybe? Why no code?

FOUND 17085 RELATED QUESTIONS

1 Answer

Tiny

rasmataz

June, 6, 2011 AT 1:51 AM

Try cleaning out the idle air control valve and test the TPS and MAP sennsor to include a fuel pressure check

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