Question about 2002 Chevrolet Cavalier Coupe
When you turn off engine and restart light goes off and it shifts out smooth again
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Posted on Jan 02, 2017
Check your o2 sensor voltage, those trucks are real bad for o2 sensors, and yes if one sensor is reading 0mv, the others will start to drop out, and the vehicle will run very, rough. You also may check fuel system pressure, should be almost 60p.s.i. If its alot lower, Id be looking into a fuel pump. If that vehicle is drive-by-wire (no throttle cable), the throttle bodies get very dirty and cause that concern also. Id start by having the vehicle scantested.
Posted on Feb 07, 2009
SOURCE: Trac off light
Replace the TPS (Throttle Position Sensor). $30 to $40 if you do it yourself or $70 to $95 if you have a service station do it. This will fix all of your problems related to the TRAC OFF light and transmission shifting into low gear.
Posted on Aug 22, 2009
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