Q: reduce engine speed , trac ,and service engine light on. Had gas pedal assembly and throttle replaced.. Wire harness or computer n

asked by on

Reduce engine speed, trac, service engine light on. Had gas pedal assembly replaced twice and throttle once. Next step wire harness or ECM computer. Any suggestions.

My car has 161000 miles.

This vehicle may have a wire harness issue of bad crimps on the connectors to the cluster, engine control module (ECM), and other areas that can cause these intermittent failures.

The codes you are receiving are most likely the areas in the harness causing the problems. There are many technical service bulletins (TSBs) for various problems in the harness and I cannot list all of them in this writing.

I would have your warning light issues checked by a mechanic that is familiar with the problems in these vehicles’ harnesses, and recommend the best path to repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. reduce engine speed , trac ,and service engine light on. Had gas pedal assembly and throttle replaced.. Wire harness or computer n

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Air conditioning won't cool

Hello, and thank you for contacting YourMechanic. When an air conditioning (AC) system does not produce cold air there could be a few issues with the system. First, open the hood and watch the compressor kick on and off with...

Q: I have a 2006 Buick Rendezvous I was just brought it and I work for the railroad so I hook power inverter up to the battery it's o

You did not mention if the fan is blowing out the vent or not? If it is and window is fogging up then you may have a clogged heater core and may need to have the cooling system flushed out...

Q: Engine light that will not go off after much work done.

The first thing to do is to have the check engine light scanned to retrieve codes for an indication of the cause of the flashing check engine light. The flashing is most likely due to a misfire in the engine....

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...