Skip the auto shop - Our mechanics make house calls

Q: reduced power and a question with the throttle body.

asked by on

My colorado wouldn't go when you pushed the gas. I turned it off and then back on and my truck went. The next day I drove it. Turned it off and would not start again. It says reduced power. I replaced battery. After clearing things it will try to to start once after that nothing. I cleaned the throttle body by taking it out and doing what they told me to do. But when I tried to move the valve plate by hand to clean it. It will not move. They told me to put it back on truck and turn the key to the on position and hit the gas and the flap should open. It does not. What is wrong? This is the type that you can not get to the sensor. It is inside throttle body.

You got a loss of power due to a fault with the system closing the throttle as a built in safety factor. The reduced power indicator is telling you that it went in to a failure mode and caused the reduced power. You will need to have the computer tested for codes to find out the exactly caused the engine to go into failure mode.

This can be due to more than just a few things, only after testing will you know what is causing it. The most common problem for this is throttle position sensor failure or the connection to one of the sensors. One of the modules might need to be cleaned and dielectric lube should be applied to kill the corrosion.

If you need help with these checks I’d recommend getting some help from a qualified technician who has the tools and capability to properly diagnose your starting issue. Once this is done, an accurate repair can be made.

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!
  1. Home
  2. Questions
  3. reduced power and a question with the throttle body.

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 like this truck but wonder what you think about the Chevy Colorado

Hello. Consumer reports can vary greatly across websites and critics. If the truck is in good condition, and was well maintained then it will likely last you a long time, assuming you keep up the maintenance. I would recommend a...

Q: Back window won't roll up

If the rear window has fallen into the door, then it is likely that the window regulator has failed. It is not uncommon for the cables to snap, causing the window to fall down into the door. As accessing the...

Q: My electronic throttle control light is flashing and when I press on the gas pedal it doesn't go pass 20-30 mph and stalling

Hello. Thank you for writing in. The two sensors work together to track the location of the pedal as its being depressed. One is located on the pedal while one is located on the firewall. It is best to replace...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...