P2138 2011 Toyota Camry Code - Throttle Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation
Quick Answer
The Accelerator Pedal Position (APP) sensor is mounted on the accelerator pedal to detect the angle of the accelerator pedal. Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) 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 2011 Toyota Camry indicates Throttle Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation.
- Common causes
- Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) 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.
Code P2138 2011 Toyota Camry Description
In the accelerator pedal position sensor, the voltage applied to terminals VPA and VPA2 of the Engine Control Module (ECM) changes between 0 V and 5 V in proportion to the angle of the accelerator pedal. The VPA is a signal to indicate the actual accelerator pedal angle and is used for the engine control. VPA2 is used to detect malfunctions of the sensor itself.
The ECM monitors the accelerator pedal angle from VPA and VPA2 signal outputs, and controls the throttle motor based on these signals.
What are the Possible Causes of the DTC P2138 2011 Toyota Camry?
- Faulty Accelerator Pedal Position (APP) Sensor
- Accelerator Pedal Position (APP) Sensor harness is open or shorted
- Accelerator Pedal Position (APP) Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2138 2011 Toyota Camry?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2138 2011 Toyota Camry 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.
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Frequently Asked Questions about P2138 2011 Toyota Camry Code
1. What does the OBDII code P2138 mean in a 2011 Toyota Camry?
P2138 indicates a voltage correlation issue between the throttle pedal position sensors 'D' and 'E', meaning the signals from the two sensors don't match as expected.
2. What are the common symptoms of code P2138 in a 2011 Toyota Camry?
Common symptoms include reduced engine power, activation of the "limp mode," hesitation during acceleration, and illumination of the check engine light.
3. What causes the P2138 code in a 2011 Toyota Camry?
Typical causes include a faulty throttle pedal position sensor, damaged wiring or connectors, corrosion in the electrical connections, or issues with the engine control module (ECM).
4. Can I drive my 2011 Toyota Camry with the P2138 code?
It’s not recommended to drive with this code active, as it can lead to unpredictable acceleration issues or reduced power, potentially creating unsafe driving conditions.
5. How do throttle pedal position sensors 'D' and 'E' work?
These sensors monitor the position of the accelerator pedal and send two separate voltage signals to the ECM to ensure accurate throttle control and redundancy for safety.
6. How can I fix the P2138 code on my 2011 Toyota Camry?
Start by inspecting and repairing any damaged wiring or corroded connectors. If the problem persists, consider replacing the throttle pedal assembly, as it contains the position sensors.
7. What tools are needed to diagnose P2138 in a 2011 Toyota Camry?
You’ll need an OBDII scanner, a multimeter to test voltage and continuity, and potentially a service manual for wiring diagrams.
8. How much does it cost to repair a P2138 code on a 2011 Toyota Camry?
Repair costs can range from $100 to $300 for parts and labor if replacing the throttle pedal assembly, but more extensive electrical repairs could increase the cost.
9. Can a dirty throttle body cause the P2138 code?
While a dirty throttle body isn’t a direct cause, it can exacerbate throttle control issues. Cleaning the throttle body may help, but focus on the pedal position sensor and wiring first.
10. Will clearing the P2138 code with a scanner fix the issue?
Clearing the code will turn off the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.
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