Fix P054C: Mechanic’s solutions that WORKED

The code P054C: “Cold Start ‘B’ Camshaft Position Timing Over-Advanced” indicates an issue with the engine’s timing. This code is often triggered by issues related to the variable valve timing (VVT) system, which adjusts the timing of the camshaft to improve engine efficiency and performance.

P054C quick overview

Meaning	P054C: Cold Start ‘B’ Camshaft Position Timing Over-Advanced
Is it serious?	Yes, it can affect engine performance and fuel efficiency, and may lead to more significant issues if not addressed.
Possible causes	– Worn or stretched timing chain or belt – Faulty VVT solenoid or actuator – Clogged oil passages affecting VVT operation – Incorrect oil viscosity or low oil level – Faulty camshaft position sensor – ECM software needing an update – Electrical issues affecting sensor signals
How to diagnose?	Check Oil Quality and Level: Ensure correct oil viscosity and level. Inspect Timing Components: Look for wear in timing belts or chains. Evaluate VVT System: Check VVT solenoids and actuators for functionality. Scope Sensor Signals: Use an oscilloscope to check the camshaft and crankshaft sensor signals. Monitor Oil Pressure: Verify if the oil pressure is sufficient for VVT system operation. Check Electrical Connections: Inspect wiring and connectors related to the camshaft position sensor. Update ECM Software: Ensure the engine control module has the latest software version. Consider Engine Wear: In high mileage vehicles, assess overall engine condition.

How to fix P054C – learn from mechanics

I looked into P054C service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.

Case #1: Ford

Vehicle Information

• 2013 Ford F-150 XL, 3.5L engine

Issue + Repair History

• MIL Lamp on
• Codes: P0012, P0014, P0022, P0024, P054a, P054c
• Previous visit: Same codes, dirty engine oil changed, added sea foam
• Codes returned after one month

Suggestions to Fix Issue

• Check timing chain and guides
• Monitor engine timing and PIDs during different conditions (cold, hot, accel, decel)
• Scope cam/crank sensors and compare with known good waveform
• Change oil more frequently with synthetic oil and proper filters
• Check oil pressure at head port for accurate reading
• Examine cam caps for scoring
• Verify oil viscosity
• Consider high mileage and potential need for engine replacement or major repairs

Final Fix

• After revisiting oil pressure, suspected leak in the top end or engine wear
• Customer deciding on further engine diagnostic or repair steps based on fleet management consultation

Case #2: Chevrolet

Vehicle Information

• Chevrolet Silverado 1500, 2015, 5.3L engine

Issue + Repair History

• Check Engine Light on
• Codes: P054C – Cold Start ‘B’ Camshaft Position Timing Over-Advanced (Bank 2)
• Previous visit: Oil filter replaced, higher grade oil used
• Issue persisted after repair

Suggestions to Fix Issue

• Check VVT solenoid functionality
• Inspect oil passages for clogging
• Verify timing chain tension and alignment

Final Fix

• Replaced faulty VVT solenoid and cleaned oil passages

Case #3: Mercedes

Vehicle Information

• Mercedes-Benz E350, 2014, 3.5L engine

Issue + Repair History

• Intermittent Engine Light
• Codes: P054C – Cold Start ‘B’ Camshaft Position Timing Over-Advanced (Bank 2)
• Recent service included oil change and air filter replacement

Suggestions to Fix Issue

• Detailed inspection of camshaft timing components
• Test oil pressure for adequate flow to camshaft adjusters
• Check electrical connections to camshaft position sensors

Final Fix

• Adjusted camshaft timing and replaced worn timing chain guides

Case #4: BMW

Vehicle Information

• BMW 328i, 2016, 2.0L Turbo Engine

Issue + Repair History

• Persistent Check Engine Light
• Codes: P054C – Cold Start ‘B’ Camshaft Position Timing Over-Advanced (Bank 2)
• Prior fixes included replacing camshaft position sensor and engine flush

Suggestions to Fix Issue

• Inspect VVT system for blockages or damage
• Check ECM software and update if necessary
• Evaluate turbocharger system’s impact on engine timing

Final Fix

• Updated ECM software and performed VVT system cleanup

Case #5: GMC

Vehicle Information

• GMC Sierra, 2017, 6.2L V8 Engine

Issue + Repair History

• Check Engine Light on
• Codes: P054C – Cold Start ‘B’ Camshaft Position Timing Over-Advanced (Bank 2)
• Recent battery replacement and alternator check

Suggestions to Fix Issue

• Inspect cam phasers for signs of damage
• Check oil quality and change frequency
• Evaluate electrical system’s impact on sensor readings

Final Fix

• Replaced damaged cam phaser and performed electrical system diagnostics

Advice	Diagnostic Step Description
Check Oil Quality and Frequency	Ensure the engine oil is clean and changed regularly, using the correct grade and type.
Inspect Camshaft Timing Components	Examine the camshaft timing parts like chains, guides, and tensioners for wear or misalignment.
Test Oil Pressure	Measure the oil pressure to ensure it is sufficient for proper camshaft operation.
Inspect VVT System	Check the Variable Valve Timing system components, including solenoids and actuators, for blockages or damage.
Scope Cam/Crank Sensors	Use an oscilloscope to analyze the signals from camshaft and crankshaft sensors for irregularities.
Update ECM Software	Verify if the Engine Control Module software is up-to-date and update if necessary.
Replace Faulty Sensors	Replace any damaged or malfunctioning camshaft position sensors.
Check Electrical Connections	Examine wiring and connectors for damage, corrosion, or loose connections.
Monitor Engine Timing	Use diagnostic tools to monitor the engine’s timing during various conditions like cold start, acceleration, and deceleration.
Evaluate Engine Components	Consider the overall condition of engine components, especially in high mileage vehicles, for wear or damage.