Awasome 2002 Envoy Check Engine Light Ideas. This issue is related to the throttle position sensor, and can be caused by faulty wiring to the tps, bad connection at the tps, or a failed tps. Check engine light for code p0128;
Ideally, you will want to troubleshoot the vehicle and check the dtcs to find out what’s causing the issues. Web 2002 gmc envoy runs rough with flashing check engine light after sparkplug change and throttle body cleaning. Web the 2002 gmc envoy has 2 problems reported for service engine light on.
