P2135 Code : Meaning, Symptoms, Causes, Fixes & Repair Cost

p2135 code

There are many types of sensors used in modern cars and other vehicles. These sensors transmit information about the functioning of various parts of the vehicle to the engine control module of the vehicle.

But sometimes these sensors give wrong information to the ECM of the vehicle or fail to give information to the ECM due to a fault in some part of the vehicle or a failure of the sensor associated with the part, which in turn causes the engine control module of the vehicle to malfunction. Is. Display a fault code related to the sensor.

Similarly, the P2135 fault code occurs in vehicles. This article will discuss in detail the symptoms and causes of the P2135 code.

What Does P2135 CODE Mean?

The P2135 code is a scanner DTC fault code that refers to a voltage problem between the throttle position sensor and the accelerator position sensor. When there is a discrepancy between the signal from the vehicle’s throttle position sensor and the accelerator pedal position sensor. Then the vehicle’s ECM displays the P2135 code.

When this P2135 code is displayed, it should be fixed as soon as possible. Because it can severely degrade the engine power and performance of your vehicle. In many cases, the engine stops receiving acceleration.

P2135 Code Definition

P2135 code definition is “Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation.”

How Do The Throttle Position Sensor & Acceleration Pedal Position Sensor Work?

The throttle position sensor generates a voltage signal for the vehicle’s ECM according to the position of the throttle valve. The more the throttle body valve opens during acceleration, the more voltage the ECM provides. The accelerator pedal position sensor plays a vital role in this function.

How far is the accelerator pedal of a vehicle pressed? The acceleration pedal position sensor signals this position to the ECM. And based on this signal, the engine control module of the vehicle issues a voltage. Due to which the engine gets successful acceleration.

Causes Of P2135 Fault Code

The P2135 code can have many different causes due to many factors. These reasons can be of the following types:

  • Faulty Throttle Position Sensor (TPS)
  • Faulty Pedal Position Sensor (PPS)
  • Wiring problem between TPS, PPS, and Engine Control Module (ECM)
  • A Malfunction Throttle Actuator Control Motor (TACM)
  • A faulty engine control module (ECM)
  • Throttle body vacuum leak

A diagnostic scanner must be used first to diagnose the P2135 fault code. so that you can get an accurate idea about the causes of the P2135 code.

Symptoms Of P2135 Code

There are several symptoms for the P2135 code. It should be diagnosed by identifying these symptoms. These symptoms can be of the following types:

  • Check engine light illuminated
  • Hesitation during acceleration
  • Low fuel efficiency
  • Throttle pedal sticking or not returning to the idle position
  • Engine power loss
  • Loss of engine performance
  • Engine no-start or hard-start
  • Engine RPM higher or lower than normal
  • Engine stalling
  • Deceleration of the engine on the go
  • Accelerator pedal unresponsive

How To Diagnose P2135 Code?

To diagnose the P2135 fault code, you must follow the following procedure:

  • The first thing you will need to do is scan the vehicle’s system with an OBD digital scanner if you see symptoms related to the P2135 code. so that you can accurately diagnose the problem related to the P2135 fault code.
  • Inspect the sensors for damage.
  • Also check the wiring related to the sensor. where the proper voltage and ground connection of the sensor can be checked.
  • Inspect valve and gasket of throttle body. so that the sticking of the valve on the throttle body and the leakage of the throttle body can be detected.
  • After this, you inspect the actuator control motor of the throttle body.
  • Lastly, you can check the engine control module of the vehicle. Faulty ECM can also be the reason for this.
  • If you are not comfortable or familiar with vehicle repair, it is always recommended that you seek assistance from a professional mechanic.

How To Fix P2135 Code?

Repairing the P2135 code depends on the cause of the problem. However, you can repeat the following process to repair it.

1. Replace Faulty Throttle Position Sensor or Accelerator Pedal Position Sensor

If you find any problems with the throttle position sensor or acceleration pedal position sensor associated with code P2135. Then you have to replace the sensors. Because both of these sensors can go bad, they can be the main cause of the P2135 code.

2. Repair or Replace TPS/PPS Sensor Wiring

The signal of the data related to any sensor of the vehicles reaches the ECM through wiring. But sometimes the wire related to the throttle position sensor or the acceleration pedal position sensor can get damaged.

Due to this, these sensors are unable to provide data to the ECM, and the ECM starts displaying the P2135 code. So check the wiring and repair it or replace it with a new one.

3. Repair or Replace Faulty ECM

A faulty ECM can be the reason for a vehicle to display any fault codes or cause any vehicle functions to not work. So after checking this, repair or replace the faulty ECM.

4. Clean or Replace Throttle Body

Over time, the throttle body of a vehicle’s engine may get clogged due to dirt. which can cause this code to appear. So clean the throttle body or replace it with a new one.

5. Contact Mechanic

If you do not have any experience with checking and diagnosing code P2135, So you can contact any vehicle professional mechanic.

P2135 Code Repair Cost

The cost to repair the P2135 code can range from $180 to $1200. The estimated cost of this repair includes the labor cost of the mechanic and the cost of replacing the parts. Because replacing the throttle body or repairing a faulty ECM can be a costly affair.

The cost to repair the P2135 code may vary depending on the specific vehicle and the cause of the code. Some common causes of the P2135 code include a faulty throttle position sensor, a problem with the wiring or connector to the sensor, or a problem with the vehicle’s computer.


Q. – How do I reset my accelerator pedal sensor?

A. – You may first need to disconnect the negative battery cable for 5 to 10 minutes or remove the ECM main fuse to reset the accelerator pedal position sensor. And you can also reset it with an OBD scanner.

Q. – How much does it cost to repair a P2135?

A. – The cost of repairing the P2135 can range from $180 to $1200 on average. Some parts may need to be repaired or replaced to fix this code.

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