Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part of the engine that helps control how the exhaust valves open and close. It's like a switch that isn't working right.
The P25D2 code indicates an issue with the electrical circuit that controls the exhaust camshaft actuator park lock on bank 1. This can affect the timing of the exhaust valves.
The exhaust camshaft actuator park lock control circuit is responsible for locking the camshaft in a specific position when the engine is off or during certain operations. A 'high' signal means that the circuit is receiving more voltage than expected, which can indicate a short circuit or a fault in the actuator or its wiring.
• Check Engine Light is on
• Reduced engine performance
• Engine may run rough
• Faulty exhaust camshaft actuator
• Wiring issues such as shorts or opens in the circuit
• Faulty control module
Camshaft: A shaft in the engine that controls the opening and closing of the valves.
Actuator: A device that moves or controls a mechanism or system.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors to the exhaust camshaft actuator.
• Test the actuator for proper operation.
• Repair or replace damaged wiring.
• Replace the exhaust camshaft actuator if faulty.
• Update or reprogram the control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Malibu
• GMC Terrain
• Buick Enclave
• Regular maintenance and inspection of engine components
• Timely replacement of worn-out parts
• Keeping the engine control module software updated
Engine Performance
• Do not ignore the Check Engine Light.
• Get the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle aggressively until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on engine components.
This code has been associated with issues in vehicles with variable valve timing systems, particularly in models with high mileage.
Moderate – While the vehicle may still be drivable, it can lead to poor performance and increased emissions.
Driving with a malfunctioning engine can lead to increased emissions and may not pass emissions testing.
• Engine at operating temperature
• Vehicle in park or neutral
The exhaust camshaft actuator is typically located on the cylinder head of bank 1, near the camshaft.
Q: Can I drive with a P25D2 code?
A: It's possible to drive, but it's not recommended as it can lead to further engine damage.
Q: How do I clear the P25D2 code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is resolved first.
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