Q: Need help with a reduced engine power warning light.

asked by on

Came on about 3 weeks ago off and on. I checked sensors and everything. The codes read it was an accelerator peddle and a throttle position sensor. Took it in to get tested and was told my throttle body was going bad so I changed that. But still in the morning the light comes on. I was told it could be the accerator peddle going bad or spark plugs. Do you have any advice on what it could be?

My car has 186915 miles.
My car has an automatic transmission.

Hello. If the trouble codes for the throttle position sensor and accelerator pedal came on then those two sensors are the first things I would check. For this vehicle, the throttle position sensor is built into the throttle body.

If after replacing the unit the code remains, then it may be possible that there is an issue with the wiring or connector. It may also be possible that the accelerator pedal position sensor is bad. The sensor is located at the base of the accelerator pedal, and as it’s name implies, measure pedal position so that the computer knows how wide to open the electronic throttle body.

If it goes bad it can set off the warning light as well as cause performance issues. In more serious cases it’s failure may even render the vehicle undrivable. If you are unsure, I would recommend having a professional technician, such as one from YourMechanic, come to your location to diagnose the cause of the warning lights so that this can be repaired properly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Need help with a reduced engine power warning light.

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: I have 18 inch rims on my truck and was wondering if a set of 35/1250r18 would work without scrubbing i have a 3 inch body lift on

They will most likely not fit without trimming the metal. I think you will not be able to go bigger than 32/1150 without trimming. It will also depend on the type of tread on the tires. Some of those knobby...

Q: 03 Ford expedition 4x4 grinding noise while applying brake and driving low speeds without touching brake. New brakes

Hi Gavin. Thanks for submitting your question today. In most cases, grinding while applying brakes is caused by worn brake pads (which you indicate were recently replaced), debris trapped between the pads and caliper, or using lower quality pads than...

Q: Battery dies/short

You may of moved and caused a harness to become disconnected or loose contact to the body control module. The module controls the interior and will cause these kind of failures. The vehicle may have damaged when you took something...

Related articles

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...
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...
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.