Error code

OBD2 P2135

OBD2P2135
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Throttle/Pedal Position Sensor/Switch 'A' / 'B' Voltage Correlation.

Severity

moderateDrive cautiously and avoid sudden acceleration. If symptoms worsen, seek immediate repair.

Summary

Code P2135 indicates a problem with the correlation between voltage signals from two throttle position sensors (TPS) or accelerator pedal position (APP) sensors in your vehicle's engine control system.

Symptoms

  • Hard starting
  • Little to no throttle response
  • Check Engine light illuminated
  • Sudden loss of engine power while driving
  • Possible stalling condition when slowing to a stop

Common Causes

  • TPS sensor failure (most common concern)
  • Poor connection or bent pins in TPS connector
  • Chafed or corroded wiring
  • APP sensor failure
  • PCM internal short (least likely but possible)

Diagnosis

  1. Check for service bulletins from the manufacturer.
  2. Test resistance between low-voltage reference circuit and ground with ignition off.
  3. Verify 5V reference voltage when ignition is on.
  4. Inspect TPS connector and wiring for corrosion or damage.
  5. Test APP sensor for proper operation.

Fixes

  • Replace faulty TPS or APP sensor

FAQ

What should I do if my Check Engine light comes on with code P2135?

Check for service bulletins and inspect the throttle position sensors, wiring, and accelerator pedal position sensor. If issues are found, replace faulty components.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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