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

Quick Answer

The throttle position sensor is mounted on the throttle with motor body assembly and detects the opening angle of the throttle valve. Common causes include Faulty Throttle Position Sensor (built into Throttle Body Assembly), Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor 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
P2135 Toyota indicates Throttle / Pedal Position Sensor / Switch 'A' / 'B' Voltage Correlation.
Common causes
Common causes include Faulty Throttle Position Sensor (built into Throttle Body Assembly), Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor 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.
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Code Popularity 40,592
How popular is this code, among other codes? Medium
What is this?
Table of contents Created and updated by William Orellana on Aug 23, 2022
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Code P2135 Toyota Description

The throttle position sensor is mounted on the throttle with motor body assembly and detects the opening angle of the throttle valve. This sensor is a non-contact type sensor. It uses Hall-effect elements in order to yield accurate signals even in extreme driving conditions, such as at high speeds as well as very low speeds.
As the valve closes, the sensor output voltage decreases and as the valve opens, the sensor output voltage increases. The Engine Control Module (ECM) calculates the throttle valve opening angle according to these signals and controls the throttle actuator in response to driver inputs. These signals are also used in calculations such as air-fuel ratio correction, power increase correction, and fuel-cut control.
The ECM uses the throttle position sensor to monitor the throttle valve opening angle. There are several checks that the ECM performs to confirm the proper operation of the throttle position sensor.
This sensor transmits two signals, if the output voltage difference between the two signals deviates from the normal operating range, the ECM interprets this as a malfunction in the throttle position sensor. The ECM illuminates the MIL and stores the Diagnostic Trouble Code (DTC).
OBDII Code P2135 Toyota - Throttle / Pedal Position Sensor / Switch 'A' / 'B' Voltage Correlation - AutoCodes.com
P2135 Toyota Code - Throttle / Pedal Position Sensor / Switch 'A' / 'B' Voltage Correlation
What does this mean?

What are the Possible Causes of the DTC P2135 Toyota?

  • Faulty Throttle Position Sensor (built into Throttle Body Assembly)
  • Throttle Position Sensor circuit is open or shorted
  • Throttle Position Sensor poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P2135 Toyota?

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 does this mean?

Code Tech Notes





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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2135 Toyota 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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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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