Skip the auto shop - Our mechanics make house calls

Q: Reduced engine power light keeps coming on.

asked by on

The Refuced Engine Power signal comes on randomly and I can't accelerate very much. I pull over and the car shakes a lot so I turn it off and wait a few minutes. Car starts back up normally and usually doesn't happen again.

My car has 185000 miles.
My car has an automatic transmission.

When a fault/error in the transmission or engine triggers the Reduced Engine Power Warning Light, the vehicle will experience an extreme loss of power and performance and vehicles may not be able to exceed speeds greater than 20 miles per hour. The Powertrain Control Module (PCM) will store one or more diagnostic trouble codes for the purpose of diagnosing the fault/error in the system. An issue or malfunction in the throttle control system is most common when the Reduced Engine Power Warning Light illuminates in the dashboard. However, there are other components and systems that will trigger this code as well. It’s always best to have a professional mechanic complete a detailed reduced power light inspection to determine what’s causing this issue.

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

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: Engine makes tapping noise, exhaust blows bluish smoke

If you are burning oil and you have a noise in the engine, then you need to have the noise checked to see if it is coming from a piston. You may also have valve problems and oil getting through...

Q: Oil relief valve issue shortly after oil was changed

I'm curious as to what "weight" of oil they put in. Most manufacturers now warn against using anything heavier than 10W30 for oil pressure relief valve (overpressure on cold start) reasons. While this is not common, overpressure due to a...

Q: How many crankshaft position sensors are on a 2011 GMC Terrain?

Usually there will only be one crankshaft position sensor. However, there is also a camshaft position sensor as well. It is more likely that there is multiple cam sensors than crank sensors. It is possible for engines to have anywhere...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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 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...