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

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!

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: Idle fluctuates when heater is turned on in my 2002 ford taurus. Car won't start after stopping when operating temperature

Hi there. The engine light will illuminate when an error is detected by a sensor or vehicle monitoring system. In many cases, a damaged mass air flow sensor, EGR valve or fuel injectors can cause inconsistent engine idle problems. When...

Q: 2008 GMC Acadia: passenger side window switch will make the window go down, but not back up. Now master switch on driver's side wo

The switch internals of one or both switches are faulty or there is a bad connection to the switches. To resolve this, the switches have to be removed from the door so that you can get access to the terminals....

Q: Engine losses power when lights are on

Hello, thank you for writing in. There are a few different angles that we can look at this problem from. The first thing to discuss is that the battery performs very little once the vehicle is running. The battery is...

Related articles

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...
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...
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.