What it means
The intake camshaft actuator park-lock circuit on bank 1 is detected as open. The code identifies an electrical circuit fault; it does not by itself establish that the phaser cannot lock or that the engine will run poorly.
At a glance
- Usually lights the check-engine light
How it works
The intake camshaft actuator park-lock solenoid on bank 1 is part of the mechanism that holds the intake camshaft phaser in its parked position under the conditions designed for that engine. The control module monitors its electrical circuit and sets P25CA when it detects an open circuit, such as an open solenoid coil or broken wire; this code does not by itself prove the phaser has failed.
Common causes
Most likely first.
- Open coil in the park-lock solenoid
- Broken control wire between ECU and solenoid
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
How to diagnose it
- Record freeze-frame data and related camshaft or actuator codes, then note whether the fault occurred during starting or engine operation.
- Identify bank 1 and the intake camshaft actuator park-lock connector, then inspect its pins and nearby harness for disconnection, corrosion, heat damage, or a broken wire.
- Check the park-lock solenoid coil and circuit continuity using the manufacturer's procedure and specifications to distinguish an open coil from an open harness.
- With the circuit safely isolated as specified by the service information, check continuity from the solenoid connector to the control module and check for unwanted opens or shorts.
- If the wiring and solenoid pass, use scan-tool actuator data or commands supported by the vehicle to assess control-module operation.
Common fixes
- Reconnect or clean and secure the bank 1 intake park-lock solenoid connector.
- Repair an open or damaged wire in the bank 1 intake actuator circuit.
- Replace the bank 1 intake park-lock solenoid if its coil is open.
- Repair the control-module circuit only after confirming the solenoid and wiring are sound.
Can I keep driving?
If the engine runs smoothly and the only symptom is the warning light, a short, gentle trip for diagnosis may be possible, but avoid hard acceleration. If it stalls, runs roughly, or loses power, stop driving because the fault may impair engine operation.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.