Skip the auto shop - Our mechanics make house calls

Q: Reduce Engine power and nothing happens when pushing the gas pedal

asked by on

My truck starts but When started a Service 4x4 sign comes on and the Reduce engine power and when you go to step on the gas nothing happens. We took it in and the code ran was the Throttle position Sensor and we changed it out but it continues to have the Reduce engine power thing come on and when i push on the gas pedal its like its not connected because the engine doesnt rev or anything

My car has 172000 miles.
My car has an automatic transmission.

Hi and thanks for contacting YourMechanic. The service 4x4 light indicates a loss of communication to the throttle position sensor, and a reduction in power is a prime indicator that the transfer case position sensor or selector switch has failed. When this happens, the computer gets a reading that the transfer case is not in the right gear, so it forces the throttle position sensor to make the engine run at a lower rate to prevent damage to the transfer case. Changing out the throttle position sensor is helpful, but not required in this situation. I would recommend replacing the transfer case position sensor or selector switch. This will fix the issue of the service 4x4 light and restore the power to the engine. If you need assistance in investigating and repairing this issue, a YourMechanic certified technician can come to your location to perform a Reduced Power light is on Inspection on your vehicle.

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
  1. Home
  2. Questions
  3. Reduce Engine power and nothing happens when pushing the gas pedal

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: Speedometer jumps up/down and van backfires. 1998 GMC Savana

Hi there, thanks for writing in about your 1998 GMC Savana 2500. The speedometer and radio may work together to adjust volume of the radio as the speed increases. The cluster or any of the affected modules may have a...

Q: I have an antifreeze leak internal I replaced the upper radiator hose new radiator as well can not see a leak or drip

Coolant leaks no matter how big or small should be addressed as soon as possible. As you noticed, the engine will run hot with a low coolant level. Even a minor leak can expand to a large or catastrophic leak...

Q: losing acceleration

If the codes say he needs a tune up, I will have to assume the engine is misfiring and is sending codes to the misfiring cylinders. Also, the system may be in a failure mode which will limit speed. You...

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...