Throttle Actuation Potentiometer Signal Too High

What this code means

The ECU detected that the throttle actuation potentiometer signal voltage is higher than the maximum expected value. This may indicate an open ground circuit or sensor failure.

Symptoms

• Check Engine Light
• Limp mode with limited throttle
• Engine may idle only
• Erratic throttle response

Common causes

• Open ground wire to throttle body
• Faulty throttle position potentiometer
• Connector pin backed out
• Throttle body internal fault
• ECU reference voltage issue

Diagnostic steps

1. Measure potentiometer signal voltage
2. Check ground circuit continuity
3. Inspect connector for backed-out pins
4. Test reference voltage from ECU
5. Compare both potentiometer readings

Repair notes

Repair the open circuit or replace the throttle body assembly.

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