Exhaust Camshaft Position Timing Over-Advanced (Bank 1)

Exhaust camshaft position actuator timing is over-advanced. On the Ecotec 2.4L, this is almost always caused by timing chain stretch or a failed exhaust cam actuator solenoid (ACDelco). Replace the timing chain kit and both VVT solenoids together. Do not just replace the solenoid without checking the chain. Your dealer can confirm whether an open service bulletin or warranty extension applies to your VIN. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.

Exhaust cam VVT solenoid is stuck advanced. Replace the exhaust side OCV (Denso). Check for sludge in the oil galleries feeding the VVT actuator. Use Toyota-approved 0W-20 synthetic oil. If the code returns, inspect the exhaust cam sprocket actuator for internal wear. This is less common than P0011 on Toyota but same diagnostic approach. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.

Same Ecotec 2.4L as Equinox -- exhaust cam actuator solenoid fails or timing chain stretches. Replace exhaust VVT solenoid (ACDelco) and inspect timing chain for stretch. If chain is loose, replace the full timing chain kit. Change oil to Dexos1-approved 5W-30 and reduce oil change interval to 5,000 miles. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.

Exhaust cam phaser is over-advanced due to worn phaser internals or low oil pressure. Check oil level and condition first. Replace the exhaust cam phaser and timing chain tensioner. Use Motorcraft 5W-30 full synthetic. If the engine has a knocking or rattling noise at startup, the phaser is the confirmed cause. Your dealer can confirm whether an open service bulletin or warranty extension applies to your VIN.