How to Fix p2135?

Alton Alexander
By Alton AlexanderUpdated on June 4th, 2022

P2135 is a diagnostic trouble code (DTC) for "Throttle Position Sensor/Switch A Circuit High Voltage". This code is triggered when the throttle position sensor (TPS) or switch A circuit detects a voltage that is higher than the normal/expected range. The most common causes for this code to be triggered are:

  1. The TPS is faulty and needs to be replaced

  2. There is a problem with the wiring to the TPS

  3. There is a problem with the throttle position sensor (TPS) itself

  4. There is a problem with the throttle body or throttle body sensor

If you are getting this code, it is important to have it diagnosed and repaired as soon as possible. A faulty TPS can cause all sorts of drivability issues including engine stalling, misfires, and poor throttle response.

Users typically search for a solution by asking about:

  • how do i fix error code p2135
  • p2135

1. Check for vacuum leaks

  1. Remove the covers over the vacuum cleaner hoses.
  2. Check for any holes or tears in the hoses.
  3. Check for any clogs or blockages in the vacuum cleaner filters.
  4. Look for any signs of liquid or gas leaking from the vacuum cleaner.
  5. If there are any signs of leaking, fix the vacuum cleaner by repairing or replacing the components that are leaking.

2. Check the throttle position sensor

  1. Disconnect the battery cable.
  2. Remove the air cleaner assembly.
  3. Remove the throttle body cover.
  4. Remove the throttle position sensor.
  5. Clean the sensor with a clean cloth.
  6. Apply a thin layer of electrical tape to the sensor.
  7. Replace the throttle position sensor.
  8. Reconnect the battery cable.

3. Check the wiring to the throttle position sensor

  1. Remove the air cleaner box.
  2. Remove the throttle body assembly.
  3. Disconnect the throttle position sensor electrical connector.
  4. Check the wiring to the sensor for continuity and proper connections.
  5. Reconnect the electrical connector and test the sensor.

4. Check for a stuck throttle

  1. Remove the air cleaner.
  2. If the throttle is a cable type, disconnect the cable from the throttle body.
  3. If the throttle is a lever type, remove the lever from the throttle body.
  4. If the throttle is a cable type, disconnect the cable from the throttle body.
  5. Check the ends of the cable for kinks or breaks.
  6. If the cable is kinked or broken, replace it.
  7. Check the throttle body for any debris or debris on the threads.
  8. Clean the throttle body and throttle lever if necessary.
  9. Reinstall the throttle body and lever.
  10. Reconnect the cable to the throttle body.

If the answers above didn't work then you should also try:

  1. Check for a faulty throttle position sensor