P1518high severityPowertrain
Throttle Actuator Control Module Serial Data Circuit
on 2001 Cadillac DeVille 4.6L V8 Northstar · FWD
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
- Check TAC module power supply
- Test serial data communication
- Inspect wiring between TAC and PCM
- Check for CAN bus faults
- Test TAC module
Repair notes
Repair communication wiring or replace TAC module.
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