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 car engine that helps control how the engine runs. It's like a switch isn't working right, and it's making the engine not work as well as it should.
The P25CB code indicates a low voltage issue in the control circuit for the intake camshaft actuator park lock on bank 1 of the engine.
The intake camshaft actuator is responsible for adjusting the timing of the intake valves in the engine. The park lock control circuit ensures the actuator is in the correct position when the engine is off. A 'low' circuit condition means there is insufficient voltage or a short in the circuit, which can affect engine performance.
• Check Engine Light is on
• Reduced engine performance
• Rough idling
• Faulty intake camshaft actuator
• Wiring issues such as shorts or open circuits
• Faulty engine control module (ECM)
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 for the intake camshaft actuator.
• Test the voltage and resistance in the actuator circuit.
• Repair or replace damaged wiring or connectors.
• Replace the intake camshaft actuator if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II Scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Malibu
• GMC Terrain
• Buick Enclave
• Regular maintenance and inspection of engine components
• Ensure proper oil levels and quality
• Address engine warning lights promptly
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid hard driving until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on engine components.
This code is often associated with issues in vehicles with variable valve timing systems.
Moderate – It should be addressed soon to avoid potential engine damage.
Driving with a malfunctioning engine component can lead to further damage and may not comply with emissions regulations.
• Engine at operating temperature
• Vehicle parked on a level surface
The intake camshaft actuator is typically located on the cylinder head near the camshaft.
Q: Can I drive with a P25CB code?
A: It's not recommended to drive for long periods with this code, as it can lead to reduced engine performance and potential damage.
Q: How do I reset the Check Engine Light after repairs?
A: Use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes to reset the system.
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