P1515high severityPowertrain
Control Module Throttle Actuator Position Performance
on 2002 Chevrolet Impala 3.8L V6 · FWD
What this code means
The PCM detected a discrepancy between the commanded throttle actuator position and the actual position. The electronic throttle control system is not achieving the position requested by the PCM.
Symptoms
- Reduced Engine Power message
- Check Engine Light
- Limited acceleration
- Engine may idle only
- Limp mode
Common causes
- Carbon buildup in throttle body
- Faulty throttle body actuator motor
- Worn or damaged TPS
- Wiring issue to throttle body
- PCM calibration issue
Diagnostic steps
- Clean throttle body
- Test throttle body motor
- Check TPS sensor readings
- Inspect all throttle body connectors
- Check for PCM software update
Repair notes
Clean throttle body. If condition persists, replace throttle body assembly. Check for PCM reprogramming TSBs.
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