P12EC GMC
Cylinder Deactivation Exhaust Flow Valve Feedback Circuit High Frequency Bank 1
GMC
P12EF GMC
Cylinder Deactivation Exhaust Flow Valve Stuck Closed Bank 1
P12E9 GMC
Cylinder Deactivation Exhaust Flow Valve Open Position Bank 1
P12EA GMC
Cylinder Deactivation Exhaust Flow Valve Closed Position Bank 1
P12E3 GMC
Cylinder Deactivation Exhaust Flow Valve Control Circuit Open
P12E7 GMC
Cylinder Deactivation Exhaust Flow Valve Feedback Circuit Low Duty Cycle Bank 1
P12E8 GMC
Cylinder Deactivation Exhaust Flow Valve Feedback Circuit High Duty Cycle Bank 1
P12C1 GMC
Cylinder 8 Injection Timing Related
P12C2 GMC
Cylinder 8 Injection Timing Advance
P12BF GMC
Cylinder 7 Injection Timing Related