Skip the auto shop - Our mechanics make house calls

Q: Reduced Engine Power and Truck won't start. PLEASE HELP ASAP! Thanks!

asked by on

We started up the truck and the Reduced Engine Power light came on. This allowed us to drive about 2 miles going about 10-15 mph! We went over a few pot holes on our 2 mile drive and the car was switching gears and locking and unlocking the doors by itself. When we reached our destination we shut off the truck and it did not start after that point. The battery is at 12 volts. We checked fuses and jumped the starter and then it turned over but it never fired. Please get back to me asap:)

My car has 140000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. The reduced power light will either trigger when there is malfunction with the vehicle and it is trying to protect itself, or when the engine actually suffers a loss in power and is struggling to run. Either way if any warning lights illuminate, you should have the vehicle scanned for diagnostic troubleshooting codes. This can be done by a technician or at most of your local automotive parts stores. The battery does very little to help run the vehicle once it is started (which is its primary function). You should be more concerned with your alternator and its performance. Your fuse box, and body control module are both capable of failing and causing these issues. These are less likely and should be kept in the back of your mind if you need to go there. For more diagnostic help, contact our service department to schedule an appointment.

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
  • Reduced Engine Power and Truck won't start. PLEASE HELP ASAP! Thanks!

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: Multiple vibrations when driving truck

Hey there, thanks for writing in about your 2015 Chevrolet Silverado 2500. Since your vehicle is still fairly new, most faults on the car should be covered by warranty. You would have to continue to work with GM on this...

Q: Engine light

You will need to have Check Engine Light tested and diagnosed to see what the code is. You may be having a cooling fan issue or some other problem that is causing the light to illuminate and the A/C to...

Q: Why does the reduced power light flash when I try to start my vehicle in the morning after sitting overnight?

It sounds like your engine needs a "tune up". This typically means new oil, oil filter, spark plugs, spark plug wires, fuel filter, fuel pump if needed, new battery, new air filter, and a few other components if need be....

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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.