What this code means

The PCM is not receiving serial data from the Throttle Actuator Control module. This communication failure prevents proper throttle control.

Symptoms

• Reduced Engine Power
• Check Engine Light
• Throttle not responding
• Vehicle may not accelerate
• Stalling

Common causes

• TAC module failure
• Serial data circuit wiring damage
• Corroded connector
• PCM failure
• CAN bus issue

Diagnostic steps

1. Check TAC module power supply
2. Test serial data communication
3. Inspect wiring between TAC and PCM
4. Check for CAN bus faults
5. Test TAC module

Repair notes

Repair communication wiring or replace TAC module.

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