Camshaft Profile Actuator B Stuck Bank 1
2002-2009 GMC Envoy 4.2L I6
Description
The camshaft profile switching actuator for Bank 1, exhaust side, is mechanically stuck. The exhaust cam profile affects scavenging and emissions.
Symptoms
- Check Engine Light
- Poor emissions performance
- Reduced engine braking
- Slight power loss
- Failed emissions test
Common Causes
- Oil sludge in actuator passages
- Faulty solenoid
- Low oil pressure to actuator
- Worn actuator mechanism
- Carbon deposits
Diagnostic Steps
- Check oil condition and level
- Command exhaust cam profile switch
- Monitor cam profile position PID
- Test oil pressure at actuator
- Inspect actuator for carbon buildup
Repair Notes
Replace exhaust cam profile actuator. Perform engine oil flush if sludge is present.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P3012 on Other Vehicles
Common Questions
What does code P3012 mean on a 2002-2009 GMC Envoy?
P3012 stands for "Camshaft Profile Actuator B Stuck Bank 1". The camshaft profile switching actuator for Bank 1, exhaust side, is mechanically stuck. The exhaust cam profile affects scavenging and emissions.
What are the symptoms of P3012 on a GMC Envoy?
Common symptoms of P3012 include: Check Engine Light, Poor emissions performance, Reduced engine braking, Slight power loss, Failed emissions test.
What causes P3012 on a 2002-2009 GMC Envoy?
Common causes of P3012 include: Oil sludge in actuator passages, Faulty solenoid, Low oil pressure to actuator, Worn actuator mechanism, Carbon deposits.