OBD2 P0228

Severity

Summary

Code P0228 indicates a high input signal from the throttle position sensor (TPS) or accelerator pedal position sensor C, which is part of the drive-by-wire system in vehicles.

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. Check TPS for correct adjustment and replace if necessary.
2. Perform a visual inspection of all wiring and connectors.
3. Test resistance, reference voltage, ground, and continuity checks on all wiring and connectors.
4. Depress the pedal slowly while monitoring sensor output with a suitable scanner.
5. Inspect throttle body for carbon deposits or other residues.

Fixes

• Replace defective TPS or pedal sensors as needed.

FAQ