Error code

OBD2 P0225

OBD2P0225
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.

Severity

moderateCan drive, but performance issues may occur.

Summary

P0225 indicates a malfunction in the throttle position sensor (TPS) or accelerator pedal position sensor C circuit. This issue affects drive-by-wire systems where no physical connections exist between the pedal and throttle plate.

Symptoms

  • Stored trouble code and illuminated CHECK ENGINE light
  • Visible black smoke from tailpipe at startup
  • Hard-starting, no-start conditions
  • 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 impeding movement

Diagnosis

  1. Check for correct adjustment of TPS sensors.
  2. Perform a visual inspection of all wiring and connectors.
  3. Test resistance, reference voltage, ground, and continuity checks on wiring and connectors.
  4. Monitor sensor output with a suitable scanner while depressing the pedal slowly.
  5. Inspect throttle body for carbon deposits or obstructions.

Fixes

  • Replace defective TPS or pedal sensors as needed.

FAQ

What does P0225 mean?

P0225 indicates a malfunction in the throttle position sensor (TPS) or accelerator pedal position sensor C circuit.

How do I diagnose P0225?

Diagnose by checking TPS adjustment, inspecting wiring and connectors for damage, testing resistance and continuity, and monitoring sensor output with a scanner.

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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