B Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)
Diagnostic trouble code P0024 indicates that the engine control module (ECM) has detected the Bank 2 'B' (exhaust) camshaft timing is more advanced than commanded. This means the variable valve timing (VVT) system is failing to properly regulate the camshaft angle, often due to oil pressure or solenoid issues.
While you can usually drive with this code, it should be diagnosed soon to prevent poor engine performance, stalling, and potential long-term wear.
Common symptoms
- Illuminated Check Engine Light
- Rough or unstable engine idle
- Engine stalling, especially at stops
- Noticeable decrease in engine power
- Reduced fuel economy
Likely causes
- Low engine oil level or dirty, degraded oil
- Faulty Bank 2 'B' camshaft variable valve timing (VVT) control solenoid
- Clogged oil passages in the VVT system
- Faulty camshaft position sensor or wiring
- Failed variable valve timing actuator/phaser
- Worn timing chain, guides, or tensioner
What to check before replacing parts
Check the engine oil level and condition.
Look for: Low oil levels or excessively dirty, sludgy oil can prevent the VVT system from operating correctly.
Inspect the wiring and connector for the Bank 2 exhaust VVT solenoid.
Look for: Look for frayed wires, loose connections, or oil intrusion in the connector that could cause a poor electrical signal.
Remove and inspect the Bank 2 exhaust VVT solenoid.
Look for: Check the solenoid screens for metal shavings, sludge, or debris that would block oil flow, and test its resistance with a multimeter.
Monitor camshaft position data using an advanced scan tool.
Look for: Compare the commanded camshaft angle versus the actual camshaft angle while driving to see if the phaser is stuck or responding sluggishly.
Inspect the timing chain, tensioners, and alignment marks.
Look for: Look for excessive slack in the timing chain or misaligned timing marks indicating the chain has stretched or jumped a tooth.
This page explains the generic P0024 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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