P054A - Cold Start Exhaust (B) Camshaft Position Timing Over-Retarded Bank 1

P054A is set when the Engine Control Module (ECM) detects that the exhaust (B) camshaft position timing for bank 1 is more retarded than the commanded target during a cold start. The Variable Valve Timing (VVT) system relies on engine oil pressure and a solenoid-operated control valve to adjust the camshaft angle. If the camshaft phaser fails to reach the required position within a calibrated timeframe during the cold start phase—often due to oil viscosity, mechanical sticking, or solenoid failure—the ECM logs this code. The logic monitors the correlation between the Crankshaft Position (CKP) and Camshaft Position (CMP) sensors.