Q: P2138

asked by on

Drove my car and check engine light P2138 came on.

My car has 109000 miles.
My car has an automatic transmission.

Hi There, Code P2138 relates to what is called a throttle position sensor. The throttle position sensor monitors the throttle position of the throttle plate inside the throttle body in relation to your foot position on the gas pedal. Based upon the inputs from the sensor reading your foot’s position on the pedal, the ECU then makes the direction to supply more or less fuel to the motor. When this sensor is not working properly, this can cause intermittent responses when pressing the gas pedal. I would suggest having a professional from Your Mechanic come to you home to diagnose and inspect your vehicle.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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: 2005 pontiac g6 won't start unless I tap gas pedal and turn key to start at same time.. Also hesitates a bit while driving.

You may have a malfunctioning idle air control valve. By holding the throttle open manually by depressing the accelerator pedal, you are allowing enough air in for the car to start. If the fault is not the idle air control...

Q: Heavy vibration when braking above 40 mph. Also vibrates in the steering wheel

This may be a variety of things, such as wheels and tires out-of-balance, poor alignment, worn or failing wheel bearings, worn or failing control arm bushings, or worn or failing suspension components. A wheel bearing will usually fail due...

Q: Should you get an alignment after an engine replacement?

Hi There, If the motor is removed and replaced properly, this should not impact the alignment. That is not to say that is unheard of as sometimes during the course of moving things around steering components may be accidentally moved,...

Related articles

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...
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...
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.