What Does P054C Mean?
The ECM has detected that the exhaust (Bank 2) camshaft position is excessively advanced beyond the expected range during cold start conditions. This is the Bank 2 equivalent of P054A, affecting the exhaust VVT phaser on the cylinder bank opposite cylinder #1. The exhaust camshaft is advancing further than the ECM is commanding during the cold start warm-up period, indicating a stuck or uncontrolled phaser.
Common Causes
35%
Worn or stuck Bank 2 exhaust VVT phaser that fails to return to the default retarded position on shutdown
25%
Degraded or incorrect viscosity engine oil causing sluggish VVT response during cold starts
25%
Bank 2 exhaust camshaft oil control valve stuck in the advance position due to sludge, debris, or solenoid failure
15%
Timing chain stretch on Bank 2 allowing the exhaust camshaft to drift from the commanded position
Diagnostic Steps
1
Step 1: Check engine oil level and condition. Verify oil meets the manufacturer-specified viscosity rating. Perform an oil service if due, as this resolves a significant percentage of cold-start VVT codes.
2
Step 2: With the engine completely cold, start the engine and monitor the Bank 2 exhaust camshaft position on live data. Compare the actual advance angle to the ECM's commanded target. Document the degree of over-advance.
3
Step 3: Compare Bank 2 exhaust camshaft response to Bank 1 during the same cold start event. If Bank 1 responds correctly but Bank 2 is over-advanced, the problem is isolated to Bank 2 components.
4
Step 4: Remove and inspect the Bank 2 exhaust OCV. Check the screen for debris, test solenoid resistance (typically 6.5-8.5 ohms), and verify the plunger moves freely. Clean or replace as needed.
5
Step 5: If OCV replacement does not resolve the issue, the Bank 2 exhaust VVT phaser requires inspection and likely replacement. Check timing chain tension and guides during the repair for any secondary wear.
Estimated Repair Cost
$150 - $1,400
Parts + labor, varies by vehicle and location
The ECM has detected that the exhaust (Bank 2) camshaft position is excessively advanced beyond the expected range during cold start conditions. This is the Bank 2 equivalent of P054A, affecting the exhaust VVT phaser on the cylinder bank opposite cylinder #1. The exhaust camshaft is advancing furth...
The most common cause of P054C (Cold Start "B" Camshaft Position Timing Over-Advanced Bank 2) is: Worn or stuck Bank 2 exhaust VVT phaser that fails to return to the default retarded position on shutdown
Typical repair costs for P054C range from $150 to $1,400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Over-advanced exhaust cam timing during cold start causes rough idle, potential stalling, and increased emissions. Stalling during cold start in traffic poses a safety risk to the driver and other vehicles.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P054C to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing (VVT) System
Difficulty
Type
Generic (SAE)
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