"B" Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)
Code P0024 means the PCM has detected that the Bank 2 "B" camshaft (exhaust cam) is over-advanced beyond commanded position. This is the Bank 2 exhaust cam counterpart to P0014. All diagnosis and repair work focuses on the Bank 2 exhaust cam VVT solenoid, its phaser, and the Bank 2 timing chain.
What You Might Notice
- Check engine light on
- Rough or unstable idle
- Hard hot starting
- Increased emissions
- Poor fuel economy
- Stalling at idle
Most Common Causes
- 1
Low or dirty engine oil
Insufficient clean oil pressure prevents the Bank 2 exhaust phaser from returning to the retard position.
- 2
Stuck-open Bank 2 exhaust VVT solenoid
Solenoid stuck in the advance state continuously supplies oil to the advance chamber, holding the cam over-advanced.
- 3
Worn Bank 2 exhaust cam phaser
Internal wear prevents the phaser from holding the retard position. Ticking or rattle from Bank 2 at idle is common.
- 4
Stretched Bank 2 timing chain
Chain stretch allows the exhaust cam to drift toward advance, making correction by the phaser more difficult.
How to Diagnose It
- 1
Check Low or dirty engine oil — Insufficient clean oil pressure prevents the Bank 2 exhaust phaser from returning to the retard position.
- 2
Check Stuck-open Bank 2 exhaust VVT solenoid — Solenoid stuck in the advance state continuously supplies oil to the advance chamber, holding the cam over-advanced.
- 3
Check Worn Bank 2 exhaust cam phaser — Internal wear prevents the phaser from holding the retard position. Ticking or rattle from Bank 2 at idle is common.
- 4
Check Stretched Bank 2 timing chain — Chain stretch allows the exhaust cam to drift toward advance, making correction by the phaser more difficult.
How to Fix It
- 1
- 2
Inspect Bank 2 exhaust VVT solenoid
Remove, inspect screen, test resistance, and replace if faulty.
- 3
Monitor Bank 2 exhaust cam timing live data
Confirm over-advance vs. commanded position with a scan tool.
- 4
Replace Bank 2 exhaust cam phaser
Replace with OEM-quality parts if phaser is worn or noisy.
- 5
Check Bank 2 timing chain
Inspect chain and tensioner if solenoid and phaser are confirmed good.
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