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 in the engine that helps control the timing of the exhaust camshaft. It's like when a toy's gears don't line up right and it can't move properly.
The P25D1 code is triggered when the engine control module (ECM) detects a low voltage signal in the exhaust camshaft actuator park lock control circuit for bank 1.
The exhaust camshaft actuator is responsible for adjusting the timing of the exhaust valves to optimize engine performance. The park lock control circuit helps ensure that the actuator is in the correct position when the engine is off. A low circuit signal indicates a potential issue with the wiring, actuator, or ECM.
• Check Engine Light is on
• Poor engine performance
• Rough idling
• Faulty exhaust camshaft actuator
• Damaged wiring or connectors
• Faulty engine control module (ECM)
ECM: Engine Control Module, the computer that manages engine functions.
Camshaft Actuator: A device that adjusts the timing of the camshaft to improve engine performance.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the exhaust camshaft actuator for proper function.
• Repair or replace damaged wiring or connectors.
• Replace the faulty exhaust camshaft actuator.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Malibu
• GMC Terrain
• Buick Enclave
• Regular maintenance checks
• Ensure proper engine oil levels
• Use quality engine oil
Sensor Issue
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
Check with the vehicle manufacturer for specific warranty coverage on engine components.
This code has been associated with issues in vehicles equipped with variable valve timing systems, particularly in models from the mid-2010s.
Moderate – While the vehicle may still be drivable, it is recommended to address the issue promptly to avoid further engine damage.
Driving with a malfunctioning camshaft actuator can lead to increased emissions and may not comply with local emissions regulations.
• Engine at operating temperature
• Vehicle in park or neutral
The exhaust camshaft actuator is typically located on the cylinder head, near the exhaust camshaft.
Q: Can I drive with a P25D1 code?
A: It's not recommended to drive with this code as it can lead to poor engine performance and potential damage.
Q: How can I prevent a P25D1 code?
A: Regular maintenance and using the correct engine oil can help prevent this issue.
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