P1517high severityPowertrain
Throttle Actuator Control Module Performance
on 2005 Buick Century 3.1L V6 · FWD
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
- Test communication between TAC and PCM
- Check TAC module power and grounds
- Inspect wiring
- Test throttle body operation
Repair notes
Replace TAC module or repair communication wiring. Check for PCM software updates.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1