Skip the auto shop - Our mechanics make house calls

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • 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: Popped a belt in the transmission

The transmission does not have belts. It does have internal metal bands. These bands hold clutch drums to get the different gears to engage. If the band breaks, the transmission will feel like it went into neutral or park. Transmission...

Q: About how much is it to fix an alternator on Rendezvous Buick?

Billing question sent to CS for the repair or replacement of the alternator on a 2002 Buick Rendezvous with a V6-3.4L engine.

Q: Coolant flow control valve and camshaft position

A camshaft position sensor is a sensor that monitors camshaft speed to regulate ignition timing and fuel injection timing. This is a small sensor that is usually easily replaced and fairly inexpensive. The coolant control valve controls the flow of...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.