What this code means

The PCM detected a general performance failure of the Throttle Actuator Control (TAC) module. The TAC module manages electronic throttle control communication.

Symptoms

• Reduced Engine Power
• Check Engine Light
• Limited throttle response
• Possible stalling

Common causes

• TAC module failure
• Communication fault between TAC and PCM
• Wiring issue
• PCM failure

Diagnostic steps

1. Test communication between TAC and PCM
2. Check TAC module power and grounds
3. Inspect wiring
4. Test throttle body operation

Repair notes

Replace TAC module or repair communication wiring. Check for PCM software updates.

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