Skip the auto shop - Our mechanics make house calls

Q: Would the throttle positioning sensor cause the engine to rev up while driving?

asked by on

When I get to about 35/40 mph the engine starts revving up, rum's go up but no power no acceleration . I just replaced the transmission a couple months ago. Could it be a sensor in the throttle body, if so, which one? Or is it something else?

My car has 195000 miles.
My car has an automatic transmission.

A: Your issues may stem from a variety of comp...

Your issues may stem from a variety of components. Have the vehicle scanned for diagnostic troubleshooting codes. This will give you more information on any issues the computer has detected. Some will not illuminate the Check Engine Light.

The vehicle may be in a "limp mode", but this would likely turn on the Check Engine Light. The first two sensors you should look into will be the camshaft and crankshaft position sensors. If one of these has failed, you should replace both of them at the same time.

To avoid any unnecessary repairs, consider YourMechanic, as one of our mobile technicians can come to your home to inspect your car and diagnose any trouble codes you have.

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: Auto gear malfunctioning with engine and gear signal blinking on the dash.

Hi there. There is an issue with the engine causing the indicator lights to flash. There has been a loss of communication between the engine and the transmission and the computer will try to fix the situation. However, if the...

Q: Speaker wires c304 connector

Hello. The connector you are looking for should be located with the radio harness or is located with the wiring going to the amplifier. The amplifier can be located in several different places. It could be located in the truck...

Q: Engine won't even try to start but all the lights turn on and battery is fine.

Hey there. One of many components can cause a no crank condition. A bad ignition switch can be a cause. If the switch does not send a signal to the starter, nothing will happen when you turn the ignition to...

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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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.