Error code

OBD2 P0229

OBD2P0229
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Throttle/Pedal Position Sensor/Switch 'C' Circuit Intermittent.

Severity

moderateCan drive, but performance issues may occur.

Summary

Code P0229 indicates an intermittent issue with the throttle position sensor (TPS) or accelerator pedal position sensor 'C' circuit, which can affect engine performance and drivability.

Symptoms

  • Stored trouble code and illuminated CHECK ENGINE light
  • Visible black smoke from the tail pipe at start up
  • Hard – , or no-starting conditions may be present
  • Poor acceleration
  • Power loss
  • Rough idling
  • Hesitation or stalling upon acceleration

Common Causes

  • Damaged, short circuited, or corroded wiring and connectors
  • Defective TPS or pedal sensors
  • Mal-adjusted TPS sensors
  • Mechanical wear in the TPS sensor and/or throttle body
  • Carbon deposits in the throttle body that impede the movement of the throttle plate

Diagnosis

  1. Perform a visual inspection of all wiring and connectors for damage or corrosion.
  2. Test sensors' output with a suitable scanner while slowly depressing the pedal.
  3. Check for obstructions that could impede the pedal's range of movement.
  4. Inspect the throttle body for carbon deposits or other residues.

Fixes

  • Replace damaged wiring and connectors, adjust or replace defective sensors as needed.

FAQ

What does 'intermittent' mean in this context?

'Intermittent' indicates a sporadic fault that may be difficult to diagnose due to its unpredictable nature.

How can I prevent carbon deposits from affecting the throttle body?

Regular maintenance and cleaning of the throttle body can help prevent excessive carbon buildup.

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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