Skip the auto shop - Our mechanics make house calls

Q: Hi I recently replaced my transmission on my 2011 GMC Terrain and now it says reduced engine power any clue to why ?

asked by on

I replaced my transmission a month ago and now my car says reduced engine power. I was curious if this problem was possibly related to the new transmission or if it could be the throttle body, and is the throttle body part of the transmission system. Also is this a code I could get read from an autozone computer or does it have to be a dealership computer. thank you

My car has 122000 miles.
My car has an automatic transmission.

The reduced power is due to a major sensor or actuator failure in the engine, transmission or other vehicle systems that the on board computer system sees as a major failure and limits the throttle and speed of the vehicle. You can get the computer scanned to get the codes in the computer but that code will still need to get diagnosed and the fail safe mode will not turn off until code is fixed and erased.

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!
  1. Home
  2. Questions
  3. Hi I recently replaced my transmission on my 2011 GMC Terrain and now it says reduced engine power any clue to why ?

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: collision sensor goes off

Hello. It sounds like there may be an intermittent problem with the collision sensor. Keep in mind that intermittent problems are some of the most difficult to diagnose. When the sensor has an intermittent problem, it may cause the truck...

Q: My Jaguar XF premium 2011 is heating up. Is that your specialty?

Billing question was sent to CS for the cost of parts and labor to repair and replace the upper radiator hose on a 2011 Jaguar XF with a V8-5.0L engine.

Q: Burning oil

There are a number of reasons that the truck could be burning oil, the one most likely to make it burn oil while driving would be a failed oil control ring on one of the pistons, and the second most...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.