What code is P2138?

Diagnostic trouble code (DTC) P2138 stands for “Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation.” It is triggered when the vehicle’s engine control module (ECM) or powertrain control module (PCM) detects that the signals from the two throttle position sensors (or two accelerator pedal position sensors) do …

Does a throttle position sensor need to be programmed?

Code errors can cause your throttle position sensor to work erratically or incorrectly. Otherwise, you’ll need professional software to reprogram your sensor. This job is best done by a professional mechanic. If your sensor just needs repairs, it could be the result of faulty or loose wiring.

What does p2138 mean on a car sensor?

Depending on the vehicle manufacturer, code P2138 can indicate either the car’s two TP sensors don’t agree, or it’s two APP sensors don’t agree. P2138 is a common issue among the following makes: Chevrolet (especially on a Chevy Malibu), Nissan, Honda, Subaru, and Acura.

What does the p1238 code on a throttle sensor mean?

Code P1238 indicates that the signals from the two throttle position sensors (or two accelerator pedal position sensors) do not correlate. What Does the P2138 Code Mean?

How does the accelerator pedal position sensor work?

Accelerator pedal position (APP) sensors provide information to the ECM/PCM concerning driver throttle requests. The ECM/PCM processes that information very rapidly, mirroring pedal movement by moving the throttle plate.

When does the throttle / pedal position sensor switch D?

It is triggered when the vehicle’s engine control module (ECM) or powertrain control module (PCM) detects that the signals from the two throttle position sensors (or two accelerator pedal position sensors) do not correlate.

What does the trouble code p2138 stand for?

The automotive trouble code P2138 throttle/pedal position sensor/switch D/E voltage correlation refers to a problem related to the throttle’s ability to open and close properly. In the 1990’s automotive manufacturers began industry-wide installation of “Drive by wire” throttle control technology.

What is the p2138 code on a Pontiac Grand Prix?

Hi all, I have a 2007 Pontiac Grand Prix with sunroof which is throwing code P2138. This has been going on for nearly a year now. When driving in rain or very wet road conditions the Reduced Engine Power message will come on along with the check engine.

How can I check the accelerator pedal sensor?

Inspect the top cover on the throttle body for cracks or warping. If any are present, call the dealer and ask if they sell just the top cover. If not, replace the throttle body. With a voltmeter, probe the accelerator pedal sensor. It will have 5 volts for reference and next to it a varying signal. Turn the key on and slowly depress the pedal.