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P2138 Acura Code - Accelerator Pedal Position Sensor A/B Incorrect Voltage Correlation

- Code Popularity: 42,786 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P2138 Acura?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Accelerator Pedal Position Sensor
  • Accelerator Pedal Position Sensor harness is open or shorted
  • Accelerator Pedal Position Sensor circuit poor electrical connection
  • Faulty Electric Throttle Control Actuator
⚠ Does your Acura have Safety Recalls? → Check here

How to Fix the DTC P2138 Acura?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes





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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2138 Acura code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • No Accelerator Pedal respsonse

Code P2138 Acura Description

Accelerator Pedal Position (APP) sensor A and Accelerator Pedal Position (APP) sensor B are potentiometers, and they are installed in the engine compartment. Accelerator Pedal Position (APP) sensors A and B are operated via the throttle cable to determine the accelerator opening value when the driver presses the accelerator pedal. The accelerator pedal opening value is converted to a signal in APP sensors A and B and transmitted to the Powertrain Control Module (PCM) to compute the target position. The target position signal is transmitted to the throttle actuator control module via the circuit. APP sensor A is for the primary control, and APP sensor B is a back-up of APP sensor A in case it malfunctions. Both sensors compare their output voltage to each other for malfunction detection. When the voltage difference of APP sensor B is out of a fixed range for a set time, the PCM detects a malfunction, and a DTC is stored.

OBDII Code P2138 Acura - Accelerator Pedal Position Sensor A/B Incorrect Voltage Correlation - AutoCodes.com
P2138 Acura Code - Accelerator Pedal Position Sensor A/B Incorrect Voltage Correlation

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Code P2138 Acura comments

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