Three problems related to check engine light on have been reported for the 2003 Chevrolet Tahoe. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Chevrolet Tahoe based on all problems reported for the 2003 Tahoe.
Tl- the contact owns a 2003 Chevrolet Tahoe. The contact stated that while coming a stop, the vehicle began to vibrate severely and the check engine warning light illuminated. In addition, the vehicle failed to accelerate when the accelerator pedal was depressed. The failure recurred intermittently. The vehicle was taken to an independent mechanic where it was diagnosed that the throttle position sensor had failed and needed to be replaced. The vehicle was repaired but the failure recurred. The vehicle was also taken to the dealer where it was diagnosed that the wiring harness had failed and needed to be repaired. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 166,000. Jo.
The reduced engine power light came on and reduced the car's power to only be able to go 20 mph. I did reach 30 mph with a down-slope. I was very scared and had my two children in the car. Thankfully, I was able to safely pull over to the side of the road. Upon researching this issue with my car make and model, it seems to be a common problem and a very serious issue. The engine's power just pulled back without warning! I am taking the car to be serviced tomorrow but cannot fathom to think what could have happened!.
When starting the vehicle, check engine light comes on and dash says reduced engine power. Vehicle will only drive about 15 miles per hour. Upon researching this through various internet websites, this same problem has and is happening to a huge amount of 2003 Tahoe owner's and it's always a faulty wiring harness problem - yet gm refuses to acknowledge there is a problem. On a side note, headlights have always been very dim.