AutoCodes – Acura – P2138 Acura

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

Quick Answer

Accelerator Pedal Position (APP) sensor A and Accelerator Pedal Position (APP) sensor B are potentiometers, and they are installed in the engine compartment. Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2138 Acura indicates Accelerator Pedal Position Sensor A/B Incorrect Voltage Correlation.
Common causes: Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 43,620

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P2138 Acura?

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

How to Fix the DTC P2138 Acura?

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

What does this mean?

Code Tech Notes

User Submitted Video

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. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2138 Acura code?

Need more information on how to fix the P2138 Acura code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2138 Acura code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2138 Acura Code

1. What are the common symptoms of OBDII code P2138 in an Acura?

The common symptoms of OBDII code P2138 in an Acura include loss of power, hesitation or stumbling during acceleration, and the vehicle going into limp mode.

2. What are the possible causes of OBDII code P2138 in an Acura?

The possible causes of OBDII code P2138 in an Acura are a faulty accelerator pedal position sensor, issues with the throttle position sensor, wiring or connector problems, or a malfunctioning electronic throttle control system.

3. How can I diagnose the cause of OBDII code P2138 in my Acura?

To diagnose the cause of OBDII code P2138 in your Acura, you can use a scan tool to check for any related trouble codes, inspect the wiring and connectors for damage or loose connections, and test the accelerator pedal position sensor and throttle position sensor using a multimeter.

4. Can I continue driving my Acura with OBDII code P2138?

It is not recommended to continue driving your Acura with OBDII code P2138, as it can lead to further damage to the engine or transmission. It is best to address the issue promptly to avoid any safety hazards.

5. How can I repair OBDII code P2138 in my Acura?

To repair OBDII code P2138 in your Acura, you may need to replace the accelerator pedal position sensor, throttle position sensor, or repair any damaged wiring or connectors. It is recommended to follow the manufacturer's repair procedures outlined in the service manual.

6. Is it possible to reset OBDII code P2138 in an Acura without fixing the underlying issue?

While you can clear the OBDII code P2138 using a scan tool, it is not advisable to do so without fixing the underlying issue. The code is likely to reappear if the root cause is not addressed, and the vehicle may continue to exhibit performance issues.

7. How long does it typically take to repair OBDII code P2138 in an Acura?

The time it takes to repair OBDII code P2138 in an Acura can vary depending on the specific cause of the issue and the availability of replacement parts. In general, it may take a few hours to a day to diagnose and repair the problem.

8. Can a DIY enthusiast fix OBDII code P2138 in an Acura?

While some DIY enthusiasts may have the skills and tools necessary to diagnose and repair OBDII code P2138 in an Acura, it is recommended to have the issue addressed by a professional mechanic to ensure proper diagnosis and repair.