P2135 to P2140: throttle and pedal sensor correlation
Two throttle or pedal position sensors that should report the same position, in their own scales, disagree by more than the computer allows.
SeverityHighCarrying on can cause expensive damage, so deal with it now.
Can you keep driving?Only as far as the workshopWhat does P2135 mean?
Each throttle body and accelerator pedal carries two sensors on purpose. They report the same movement in different ways, and the engine computer compares them all the time. When they drift apart, the computer cannot tell which one is right, so it stores a correlation code and usually cuts power or holds the throttle near idle until the fault is fixed.
What causes P2135?
- A worn or dirty throttle body whose sensor track no longer reads cleanly
- A poor connection at the throttle body or the pedal plug
- Damaged wiring between the sensors and the engine computer
- A failed accelerator pedal sensor, for the pedal pairs
- A low battery voltage that skews the sensor readings
What to check first for P2135
- Check the battery voltage and the main ground connections first
- Unplug, inspect and reseat the throttle body and pedal connectors
- Compare the two signals on a scan tool through the whole pedal travel
- If the throttle body is replaced, have the throttle relearn procedure done
Can you drive with P2135?
Drive only to a workshop and expect little or no acceleration. Avoid fast roads, and have the car towed if it will barely move or the power drops in and out.
Since May 2018 an engine warning light that stays on is a major defect at the MOT, so the car fails until the fault is fixed.
Codes on this page
- P2135Throttle/Pedal Position Sensor/Switch "A" / "B" Voltage Correlation
- P2136Throttle/Pedal Position Sensor/Switch "A" / "C" Voltage Correlation
- P2137Throttle/Pedal Position Sensor/Switch "B" / "C" Voltage Correlation
- P2138Throttle/Pedal Position Sensor/Switch "D" /"E" Voltage Correlation
- P2139Throttle/Pedal Position Sensor/Switch "D" / "F" Voltage Correlation
- P2140Throttle/Pedal Position Sensor/Switch "E" / "F" Voltage Correlation
Related codes
Checked on · Rafael Soares
These are the generic meanings every manufacturer shares. Each brand adds its own detail, so your car's handbook, its service information and a qualified mechanic have the last word. OdoKeep has no connection with any manufacturer, and the app does not read codes from the car.
