Q: My recently purchased used vehicle is now reading "Engine Power Reduced". What does this mean and what is the repair and costs? 2010 GMC Terrain

asked by on December 12, 2016

The vehicle also acts and feels as if it's going to stall out. These issues started suddenly.

My car has 71000 miles.
My car's transmission is unknown to me.

Hi - the "Reduced Engine Power" message is an "aggregate message", sort of like "Check Engine", which can be caused by both engine or transmission problems. Engine performance is cut back, in theory to avoid further damage. First task is to look at problem codes using a code reader. This should provide real insight in to the specific problem causing this condition. I would recommend a Check Engine service by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

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

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

No spark with new ignition coil

You probably have a bad crankshaft sensor. If the computer does not read a signal from the crank sensor when trying to start the car, it does not send power to the fuel pump or ignition coil. A certified technician...

Lights, radio, windows not working, SRS light on, car runs very rough

This is likely either a dead battery or a battery connection problem. Try checking the battery ground (black cable opposite end of the battery connection) to be sure is properly connected to the chassis of the car. An intermittent ground...

Hi I have this dtc:P0698 description (failure of wiring and connection. failure of spark plug control module) engin no start

Hi there. Typically this is a failure in the ignition control circuit. Most of the time it is a wiring failure going to the ignition coils such as a bad ground connection. It can also be caused by a failure...

Related articles

P0563 OBD-II Trouble Code: System Voltage High
P0563 code means a voltage reading is out of the normal range due to a faulty alternator or starter, battery, voltage regulator, or wiring issues.
B1998 OBD-II Trouble Code: Passenger Side Side-Mount Air Bag Circuit Open
B1998 trouble code means there's a problem with the passenger side side-mount air bag, caused by damaged electrical components, such as blown fuses.
P0391 OBD-II Trouble Code: Camshaft Position Sensor "B" Circuit Range/Performance (Bank 2)
P0391 code means indicates that the problem is on the side of the engine which does not contain cylinder #1 due to bad sensors, or connectors.