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P2135 Toyota Code - Throttle / Pedal Position Sensor / Switch 'A' / 'B' Voltage Correlation

Quick Answer

The P2135 code for Toyota vehicles indicates a problem with the Throttle / Pedal Position Sensor / Switch 'A' / 'B' Voltage Correlation. Common causes include Faulty throttle position sensor (TPS) or accelerator pedal position sensor (APPS), Wiring or connector issues in the sensor circuit, Corrosion or contamination in the sensor connectors. 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
P2135 Toyota indicates Throttle / Pedal Position Sensor / Switch 'A' / 'B' Voltage Correlation.
Common causes
Common causes include Faulty throttle position sensor (TPS) or accelerator pedal position sensor (APPS), Wiring or connector issues in the sensor circuit, Corrosion or contamination in the sensor connectors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P2135 Toyota Description

The P2135 code for Toyota vehicles indicates a problem with the Throttle / Pedal Position Sensor / Switch 'A' / 'B' Voltage Correlation. This code is specifically related to a discrepancy between the voltage signals from the throttle position sensor (TPS) and the accelerator pedal position sensor (APPS). Both sensors play a crucial role in the operation of the vehicle's electronic throttle control system, which regulates the amount of air entering the engine for combustion.

OBDII Code P2135 Toyota - Throttle / Pedal Position Sensor / Switch 'A' / 'B' Voltage Correlation
P2135 Toyota Code - Throttle / Pedal Position Sensor / Switch 'A' / 'B' Voltage Correlation

Common Causes of P2135 Toyota

  1. Faulty throttle position sensor (TPS) or accelerator pedal position sensor (APPS).
  2. Wiring or connector issues in the sensor circuit.
  3. Corrosion or contamination in the sensor connectors.
  4. Electronic Control Module (ECM) malfunction.
  5. Environmental factors such as extreme temperatures affecting sensor performance.

Symptoms of P2135 Toyota

  1. Engine hesitation or lack of response when pressing the accelerator pedal.
  2. Rough idling or unstable engine speeds.
  3. Stalling or difficulty starting the engine.
  4. Reduced power output or inability to reach higher speeds.
  5. Illumination of the check engine light on the dashboard.

How to Fix P2135 Toyota

  1. Begin by diagnosing the specific cause of the P2135 code using a diagnostic scanner to retrieve freeze frame data and live sensor readings.
  2. Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections. Repair or replace any damaged components as needed.
  3. Test the throttle position sensor (TPS) and accelerator pedal position sensor (APPS) using a multimeter to verify their functionality. Replace any faulty sensors.
  4. Clear the diagnostic trouble codes from the ECM memory and perform a throttle relearn procedure to recalibrate the sensors.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the check engine light does not reappear.

Cost to Fix P2135 Toyota

The typical repair costs for addressing the P2135 code in a Toyota vehicle can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing a faulty throttle position sensor or accelerator pedal position sensor can range from $100 to $300 each, including parts and labor. However, if additional components need to be replaced or if wiring repairs are necessary, the total repair cost could be higher.

What does this mean?

Tech Notes for P2135 Toyota





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Information for Specific Toyota Models

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 P2135 Toyota Code

1. What are the common symptoms of OBDII code P2135 in a Toyota?

- Common symptoms include reduced engine power, hesitation or surging during acceleration, and the vehicle going into limp mode.

2. What is the main cause of OBDII code P2135 in a Toyota?

- The main cause is a correlation issue between the signals from the throttle position sensor and the accelerator pedal position sensor.

3. How can I diagnose OBDII code P2135 in my Toyota?

- Diagnosing involves checking the wiring harness and connectors for any damage, testing the throttle position sensor and accelerator pedal position sensor, and ensuring proper voltage readings.

4. Can a dirty throttle body cause OBDII code P2135 in a Toyota?

- Yes, a dirty throttle body can cause erratic readings from the throttle position sensor, leading to the P2135 code.

5. What are some repair tips for fixing OBDII code P2135 in a Toyota?

- Repair tips include cleaning the throttle body, replacing the throttle position sensor or accelerator pedal position sensor if faulty, and ensuring all connections are secure.

6. Is it safe to drive with OBDII code P2135 in a Toyota?

- It is not recommended to drive with this code as it can lead to unsafe driving conditions and potential loss of power while on the road.

7. Can resetting the ECU clear OBDII code P2135 in a Toyota?

- Resetting the ECU may temporarily clear the code, but it will likely return if the underlying issue with the throttle position sensor persists.

8. Is OBDII code P2135 a common issue in Toyota vehicles?

- Yes, P2135 is a common issue in Toyota vehicles, especially in models with electronic throttle control systems.

9. How much does it typically cost to repair OBDII code P2135 in a Toyota?

- The cost of repairs can vary depending on the extent of the issue, but it may range from $200 to $500 for parts and labor.

10. Can I fix OBDII code P2135 in my Toyota myself, or should I seek professional help?

- Fixing the issue yourself is possible if you have the necessary tools and knowledge. However, if you are unsure, it is recommended to seek professional help to ensure the problem is diagnosed and repaired correctly.

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