Exhaust Camshaft Timing Over-Advanced (Bank 1)
In short
P0014 means the engine computer detected that the exhaust camshaft on Bank 1 is timed further advanced than commanded by the variable valve timing (VVT) system. The most common real-world cause is a stuck or sludged exhaust camshaft oil control valve (VVT solenoid), very often due to dirty or low engine oil restricting oil flow to the cam phaser.
Is it safe to drive with P0014?
It is generally safe to drive short-term, but you should fix it promptly. The engine may run rough, lose power, or stall, and ignoring the underlying oil-flow problem can accelerate wear on the cam phaser and timing components. If you notice rattling on startup, severe stalling, or the check engine light flashing, stop driving and address it immediately.
Symptoms
- Check engine light on (steady, sometimes with P0011/P0021)
- Rough or unstable idle, especially when cold
- Hard starting or longer cranking, sometimes a brief startup rattle
- Noticeable loss of power or sluggish acceleration
- Increased fuel consumption
- Occasional stalling at idle or when coming to a stop
Common causes (most → least likely)
How to diagnose it (before buying parts)
- 1 Scan and record all stored codes and freeze-frame data; note whether related codes (P0011, P0021, P0024) are present and the conditions when the code set.
- 2 Check engine oil level and condition first — top off or change dirty/sludged oil before any further diagnosis, as low or contaminated oil is a leading cause.
- 3 Inspect the Bank 1 exhaust VVT solenoid connector and wiring for corrosion, damage, or looseness; measure solenoid resistance and check for proper voltage/ground.
- 4 Remove the oil control valve and inspect it and its screen for sludge or debris; clean or test its operation (many can be bench-tested or commanded with a scan tool).
- 5 Use a scan tool with live data to command the cam phaser and watch actual vs. desired camshaft angle; if the cam stays over-advanced with a known-good solenoid and clean oil, suspect the phaser or timing chain.
Repair options & cost
By manufacturer
Ecotec and small-block engines are well known for VVT/cam actuator and solenoid issues; P0011/P0014 often trace to oil control valve screens clogging or timing chain stretch on higher-mileage engines.
VVT-i camshaft timing oil control valves can stick or get clogged with sludge, especially with neglected oil changes; cleaning or replacing the OCV frequently resolves the code.
Theta and Nu engines commonly set cam timing codes from oil control valve faults; using the correct oil viscosity and keeping oil clean is critical to the VVT system.
VCT (variable cam timing) solenoids and phasers are a known weak point; sticking VCT solenoids and worn phasers can set over-advanced timing codes, sometimes with a startup rattle.
Frequently asked questions
Can low oil cause a P0014 code?
Yes. The VVT system uses pressurized engine oil to move the cam phaser, so low or dirty oil is one of the most common causes of P0014. Always check the oil level and condition first, and an oil change with the correct grade often clears the code.
Is it safe to drive with a P0014 code?
Usually for short distances, but you should fix it soon. The engine may run rough, lose power, or stall, and continuing to drive with an underlying oil-flow problem can damage the cam phaser and timing components. Stop driving if you hear loud rattling or the light starts flashing.
How much does it cost to fix P0014?
If it is just an oil change or a VVT solenoid, repairs often run roughly 60 to 450 dollars at a shop. If the camshaft phaser or a stretched timing chain is to blame, costs can climb to 700 to 2000 dollars or more depending on the engine.
What is the difference between P0011 and P0014?
Both are Bank 1 cam timing over-advanced codes, but P0011 refers to the intake camshaft and P0014 refers to the exhaust camshaft. They share the same common causes — oil control valve, oil condition, and phaser problems — and frequently appear together.