P054C: Cold Start Camshaft Timing Over-Advanced Bank 2
P054C indicates that during cold start, the Engine Control Module (ECM) detected that the camshaft timing on Bank 2 (the side opposite cylinder #1) is more advanced than the commanded value. This typically occurs when the variable valve timing (VVT) system, often controlled by an oil control solenoid, allows too much oil flow to the cam phaser, advancing the camshaft beyond the target. Over-advanced timing can cause rough idle, poor performance, and increased emissions. Common causes include a stuck VVT solenoid, contaminated engine oil, a faulty cam phaser, or wiring issues.
01. Most Common Causes
- Stuck or faulty VVT solenoid on Bank 2
- Contaminated or low engine oil
- Faulty camshaft phaser on Bank 2
- Wiring or connector issues to VVT solenoid
02. Symptoms You Will Notice
- Rough idle or stalling during cold start
- Check Engine Light illuminated
- Reduced engine performance and fuel economy
- Possible hesitation or misfire
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data. Check for other related codes.
Step 2: Inspect engine oil level and condition; change oil if dirty or low.
Step 3: Test the Bank 2 VVT solenoid resistance and operation with a multimeter or scan tool.
Step 4: Visually inspect wiring and connectors for damage or corrosion.
Step 5: If solenoid and wiring are OK, suspect a faulty cam phaser or timing chain issue.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as over-advanced timing can cause engine damage. You may experience rough running and reduced power. Have it diagnosed promptly.
How much does it cost to fix?▼
Costs vary: a VVT solenoid replacement is typically $50-$150 for parts and labor. If the cam phaser needs replacement, costs can be $300-$800 or more.