What causes fault code P054C?

• Most likely: Faulty or fouled VVT solenoid (Oil Control Valve) for Bank 2. • Likely: Incorrect oil viscosity or contaminated engine oil (sludge buildup). • Possible: Worn or sticking camshaft phaser (mechanical failure). • Rare: Low engine oil pressure during cold start or blocked oil galleries feeding the VVT unit.

Powertrain (Engine & Gearbox)Standard EOBD

P054C - Cold Start B Camshaft Position Timing Over-Retarded (Bank 2)

Q: What are the symptoms of fault code P054C?

• Check Engine Light (MIL) illuminated. • Rough idle or stalling immediately after a cold start. • Reduced engine performance during acceleration. • Increased fuel consumption. • Emissions test failure due to elevated HC/NOx levels.

Q: How do you fix fault code P054C?

STEP 1: Check engine oil level and condition. If oil is old or of the wrong viscosity, perform an oil and filter change immediately. STEP 2: Inspect VVT solenoid connector for corrosion. Measure solenoid resistance with a multimeter; typical values are 7-12 Ohms. STEP 3: Perform an active component test using a scan tool. Manually command the solenoid and monitor the camshaft angle change (Duty cycle 0-100%). STEP 4: Remove the Bank 2 exhaust VVT solenoid and inspect for debris or sludge in the micro-screens. Clean or replace as necessary. STEP 5: If the issue persists, the camshaft phaser (actuator) may be mechanically faulty and require replacement.

Last updated:1 February 2026

Related:VVT Solenoid, Camshaft Phaser, Oil Control Valve (OCV), Engine Oil Pressure Sensor, Timing Chain/Belt

System

Powertrain (Engine & Gearbox)

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Technical Description

P054C is an OBD-II generic code that indicates the Engine Control Module (ECM) has detected that the exhaust camshaft timing for Bank 2 is more retarded than the commanded position during the cold start primary phase. The Variable Valve Timing (VVT) system relies on oil pressure controlled by a solenoid to advance or retard camshaft timing. If the camshaft fails to reach the target advanced position within a specific timeframe during cold start, this code is logged. This is critical for reducing emissions (NOx and HC) during the engine's warm-up period.

Possible Causes

Faulty or fouled VVT solenoid (Oil Control Valve) for Bank 2.

Incorrect oil viscosity or contaminated engine oil (sludge buildup).

Worn or sticking camshaft phaser (mechanical failure).

Low engine oil pressure during cold start or blocked oil galleries feeding the VVT unit.

Symptoms

Check Engine Light (MIL) illuminated.

Rough idle or stalling immediately after a cold start.

Reduced engine performance during acceleration.

Increased fuel consumption.

Emissions test failure due to elevated HC/NOx levels.

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P054C - Cold Start B Camshaft Position Timing Over-Retarded (Bank 2)

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P054C - Cold Start B Camshaft Position Timing Over-Retarded (Bank 2)

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