P2138 2005 Toyota Highlander 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 2005 Toyota Highlander 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 2005 Toyota Highlander 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 2005 Toyota Highlander?
- 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 2005 Toyota Highlander?
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 2005 Toyota Highlander 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 2005 Toyota Highlander code?
Need more information on how to fix the P2138 2005 Toyota Highlander code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2138 2005 Toyota Highlander code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2138 2005 Toyota Highlander Code
1. What are common symptoms of OBDII code P2138 in a 2005 Toyota Highlander?
- Common symptoms include reduced engine power, hesitation or stalling, and illuminated Check Engine Light.
2. What does OBDII code P2138 in a 2005 Toyota Highlander indicate?
- This code indicates a Throttle Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation issue.
3. What are some possible causes of OBDII code P2138 in a 2005 Toyota Highlander?
- Possible causes include a faulty throttle pedal position sensor, damaged wiring or connectors, or issues with the throttle body.
4. How can I diagnose the cause of OBDII code P2138 in my 2005 Toyota Highlander?
- Diagnosis typically involves using a scan tool to check for the code, testing the throttle pedal position sensor, inspecting wiring, and checking the throttle body.
5. Can I still drive my 2005 Toyota Highlander with OBDII code P2138?
- It is not recommended to drive the vehicle with this code as it may result in reduced engine power or stalling, potentially causing safety issues.
6. How can I repair OBDII code P2138 in my 2005 Toyota Highlander?
- Repair typically involves replacing the faulty throttle pedal position sensor, repairing any damaged wiring, and resetting the fault code using a scan tool.
7. Are there any tips for preventing OBDII code P2138 in a 2005 Toyota Highlander?
- Regular maintenance, such as cleaning the throttle body and inspecting wiring, can help prevent issues that may trigger this code.
8. Is it possible to reset OBDII code P2138 in a 2005 Toyota Highlander without repairing the issue?
- While you can clear the code with a scan tool, it is important to address the underlying problem to prevent it from recurring.
9. How much does it typically cost to repair OBDII code P2138 in a 2005 Toyota Highlander?
- The cost of repair can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor.
10. Can a DIY enthusiast repair OBDII code P2138 in a 2005 Toyota Highlander?
- Depending on the skill level and tools available, some DIY enthusiasts may be able to replace the throttle pedal position sensor or address wiring issues, but professional help is recommended for accurate diagnosis and repair.
Discuss the causes and fixes for P2138 2005 Toyota Highlander OBDII Code
Code P2138 2005 Toyota Highlander comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
