P2129 OBD II Trouble Code Throttle Position Sensor/Switch E Circuit Intermittent

Symptoms of P2129 OBD II Trouble Code

  • Hesitation upon acceleration
  • Black smoke from engine exhaust (especially on start up)
  • Delayed engine startup (particularly on cold start)
  • Diminished fuel efficiency
  • Stored emissions related codes may accompany a P2129

Common Causes of P2129 OBD II Trouble Code

  • Defective or misadjusted TPS
  • Open or shorted TPS "E" wiring or connectors
  • Binding or damaged throttle plate
  • Bad PCM or a PCM programming error

Severity of P2129 OBD II Trouble Code

The TPS plays an important role in engine drivability, therefore a stored code P2129 should be addressed with some degree of urgency.