P2138 2016 Toyota RAV4 Code - Throttle Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation
Quick Answer
The Accelerator Pedal Position (APP) sensor is built into the accelerator pedal sensor assembly and has 2 sensor circuits: VPA (main) and VPA2 (sub). Common causes include Faulty Accelerator Pedal Position (APP) 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 2016 Toyota RAV4 indicates Throttle Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation.
- Common causes
- Common causes include Faulty Accelerator Pedal Position (APP) 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.
Code P2138 2016 Toyota RAV4 Description
The ECM monitors the actual accelerator pedal opening angle (throttle valve opening angle) through the signals from VPA and VPA2 and controls the throttle actuator according to these signals.
When either the output voltage of VPA or VPA2 deviates from the standard range, or the difference between the output voltages of the 2 sensor circuits is more than the threshold, the ECM determines that there is a malfunction in the accelerator pedal position sensor. The ECM then illuminates the MIL and stores a Diagnostic Trouble Code (DTC).
What are the Possible Causes of the DTC P2138 2016 Toyota RAV4?
- Faulty Accelerator Pedal Position (APP) Sensor
- Accelerator Pedal Position Sensor harness is open or shorted
- Accelerator Pedal Position Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2138 2016 Toyota RAV4?
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 2016 Toyota RAV4 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 2016 Toyota RAV4 Code
1. What does OBDII code P2138 mean in a 2016 Toyota RAV4?
P2138 indicates a voltage correlation issue between Throttle Pedal Position Sensor/Switch 'D' and 'E', which monitor the accelerator pedal's position.
2. What are the common symptoms of code P2138 in a 2016 Toyota RAV4?
Symptoms include reduced engine power, unresponsive acceleration, the throttle lagging or surging, and the check engine light being illuminated.
3. What causes the P2138 code to appear in a Toyota RAV4?
Common causes include a faulty throttle pedal position sensor, damaged or corroded wiring, poor electrical connections, or a malfunctioning Engine Control Module (ECM).
4. Can you drive a 2016 Toyota RAV4 with a P2138 code?
It’s not recommended to drive with this code since it can lead to reduced engine power or throttle failure, creating a safety hazard.
5. How is the P2138 code diagnosed in a Toyota RAV4?
Diagnosis involves scanning for codes, inspecting the accelerator pedal position sensors, checking wiring and connectors for damage, and testing the sensor voltages.
6. How do you fix the P2138 code on a 2016 Toyota RAV4?
Repairs may include replacing the throttle pedal position sensor, repairing damaged wiring, cleaning corroded connectors, or reprogramming/replacing the ECM if necessary.
7. How much does it cost to fix a P2138 code in a Toyota RAV4?
The repair cost can range from $100 to $500, depending on whether the issue is with the sensor, wiring, or ECM.
8. Can a dirty throttle body cause the P2138 code on a 2016 RAV4?
A dirty throttle body is not a typical cause of this code, but it may contribute to throttle-related issues. The primary focus should be on the pedal position sensors and wiring.
9. What tools are needed to troubleshoot the P2138 code on a Toyota RAV4?
You’ll need an OBDII scanner, a multimeter to test voltages, and basic tools for inspecting and repairing wiring or connectors.
10. Does the P2138 code always mean the throttle pedal position sensor is bad?
No, the issue could also stem from wiring problems, poor electrical connections, or a faulty ECM. A thorough diagnosis is necessary.
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