P0024

Universal

Exhaust Camshaft Position Timing - Over-Advanced (Bank 2)

Definition source: General OBD-II reference catalog

Definition verification: Not independently verified for display.

Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium

Medium Severity

The engine computer detects that the exhaust camshaft timing on Bank 2 is more advanced than it expects. The camshaft timing system adjusts valve operation to suit engine conditions; if actual timing does not match the command, the engine may run poorly or lose performance. This code identifies a detected condition, not proof that a particular part has failed.

Report an error with this code

⚠️ Before You Begin (Safety First)

Arrange diagnosis soon. If the engine runs very roughly, stalls, loses significant power, or develops unusual mechanical noise, stop driving when it is safe to do so and have the vehicle inspected. Continuing to drive with severe symptoms may increase the risk of engine damage.

Common Symptoms

The check-engine light may be on.
The engine may idle roughly or run unevenly if the timing difference affects combustion.
Reduced power or slower acceleration may occur if valve timing is not being controlled as expected.
Fuel economy may worsen if the engine is operating less efficiently.
Starting may be difficult in some cases, depending on how much the cam timing is affected.
There may be no noticeable symptoms, especially if the detected timing difference has little effect on how the engine runs.

Common Causes

Engine oil level, condition, or flow may interfere with the oil-operated cam timing control system.
A VVT control valve or camshaft phaser may not respond correctly to commands.
Wiring or connector problems may disrupt control or feedback signals.
A camshaft or crankshaft position signal problem may affect the computer's timing calculation.
Mechanical cam timing may be out of position or another mechanical issue may prevent the camshaft from following the commanded timing.

Diagnostic Steps

Note how the engine runs and whether the check-engine light is steady or flashing; stop driving if severe noise, stalling, or major power loss occurs.
Use a compatible scan tool to record the code and any related codes before clearing anything; related information can help distinguish a timing-control problem from a sensor or wiring issue.
With the vehicle parked safely and the engine off, check the engine oil level and condition using the owner's manual procedure. Correct an improper level with the specified oil, and seek diagnosis if the oil is contaminated or the level keeps dropping.
When the engine is off and cool, visually check accessible Bank 2 cam timing system wiring and connectors for obvious damage, looseness, or contamination. Do not unplug or probe components while the engine is running.
If the code returns or symptoms persist, arrange diagnosis using vehicle-specific service information rather than replacing a part based on the code alone.

When to Call a Professional

A technician can compare commanded and actual exhaust cam timing for Bank 2, review related codes and scan data, and check the VVT control system, oil supply, electrical signals, sensor operation, and mechanical timing as appropriate. Exact tests and specifications depend on the vehicle's model, year, and engine.

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Commonly Asked Questions

Does P0024 prove the Bank 2 exhaust camshaft phaser is faulty?

No. The code reports that the detected exhaust cam timing is more advanced than expected. Oil supply, control components, wiring, position signals, or mechanical timing may also be involved.

Can low or degraded engine oil contribute to this code?

Yes. Oil can be part of the cam timing control mechanism, so an incorrect level or unsuitable oil condition may interfere with its operation. Check the vehicle's oil requirements and investigate recurring level loss.

Is Bank 2 the same on every engine?

No. Bank identification depends on the engine layout. Use vehicle-specific service information to identify Bank 2 and the relevant exhaust camshaft.

Can I keep driving with P0024?

Driving risk depends on the symptoms and cause. Seek prompt diagnosis, and stop driving if the engine runs severely, stalls, loses significant power, or makes unusual mechanical noise.

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