P2138 2007 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 2007 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 2007 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 2007 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 2007 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 2007 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.
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Frequently Asked Questions about P2138 2007 Toyota Highlander Code
1. What are the common symptoms of OBDII code P2138 on a 2007 Toyota Highlander?
- Common symptoms include engine hesitation, lack of power, rough idling, and potential stalling while driving.
2. What does the Throttle Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation error code P2138 mean on a 2007 Toyota Highlander?
- This code indicates that there is a discrepancy between the voltage signals from the throttle position sensor and the pedal position sensor.
3. What are the possible causes of OBDII code P2138 on a 2007 Toyota Highlander?
- The potential causes include faulty throttle position sensor, malfunctioning pedal position sensor, wiring issues, or a problem with the electronic throttle control system.
4. Can driving with OBDII code P2138 on a 2007 Toyota Highlander cause further damage?
- Continuing to drive with this code can potentially lead to more serious issues like reduced engine performance, increased fuel consumption, and even safety concerns due to potential loss of throttle control.
5. How can I diagnose and repair OBDII code P2138 on my 2007 Toyota Highlander?
- Diagnosis typically involves testing the throttle and pedal position sensors, checking the wiring connections, and verifying the signals with a scan tool. Repair may involve replacing the faulty sensors, repairing wiring, or recalibrating the system.
6. Is it safe to continue driving my 2007 Toyota Highlander with the throttle position sensor error code P2138?
- It is not recommended to drive the vehicle with this code, as it can lead to unsafe driving conditions and potential loss of throttle response.
7. How much does it cost to fix OBDII code P2138 on a 2007 Toyota Highlander?
- The cost of repairing this code can vary depending on the exact cause of the issue, but it may range from a few hundred dollars to over a thousand dollars, including parts and labor.
8. Can I reset the OBDII code P2138 on my 2007 Toyota Highlander by disconnecting the battery?
- While disconnecting the battery may clear the code temporarily, it is important to address the root cause of the issue to prevent the code from reappearing.
9. Will OBDII code P2138 on a 2007 Toyota Highlander cause the check engine light to illuminate?
- Yes, this code typically triggers the check engine light to alert the driver of a potential issue with the throttle pedal position sensor/switch voltage correlation.
10. How can I prevent OBDII code P2138 from appearing on my 2007 Toyota Highlander in the future?
- Regularly maintaining and servicing the throttle control system, including cleaning sensors, checking wiring connections, and addressing any issues promptly, can help prevent the recurrence of this code.
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