What Does P003F Mean?
The ECM has detected that the 'A' camshaft profile control on Bank 2 is stuck in the on (activated) position. The cam profile on the Bank 2 intake camshaft cannot deactivate and return to the default setting. This causes rough idle, poor low-speed performance, and potential stalling since the high-lift or advanced profile is not appropriate for idle and low-RPM conditions.
Common Causes
30%
Cam profile switching mechanism jammed in the engaged position on Bank 2
25%
Bank 2 oil control valve stuck in actuated position
20%
Contaminated oil preventing locking pin disengagement
15%
Broken return spring in the Bank 2 profile switching mechanism
10%
Electrical fault keeping the Bank 2 solenoid energized
Diagnostic Steps
1
Monitor the Bank 2 cam profile control command at idle and compare actual cam position. If the ECM commands OFF but the profile stays engaged, the issue is mechanical or hydraulic.
2
Disconnect the Bank 2 profile solenoid connector and verify no voltage is present when the ECM should not be commanding it. Voltage present indicates a short to power in the wiring.
3
Inspect the engine oil for contamination, sludge, and metal particles. Perform an oil analysis if possible. Degraded oil is the root cause of many cam profile switching failures.
4
Remove the Bank 2 oil control valve and inspect it. Ensure the spool returns fully when released and the screen is clean. Compare operation to the Bank 1 OCV.
5
If the OCV tests good, the cam profile mechanism is jammed. This requires valve cover removal to inspect the Bank 2 rocker arm assembly, switching pins, and return springs for mechanical failure.
Estimated Repair Cost
$200 - $1,000
Parts + labor, varies by vehicle and location
The ECM has detected that the 'A' camshaft profile control on Bank 2 is stuck in the on (activated) position. The cam profile on the Bank 2 intake camshaft cannot deactivate and return to the default setting. This causes rough idle, poor low-speed performance, and potential stalling since the high-l...
The most common cause of P003F ("A" Camshaft Profile Control Stuck On Bank 2) is: Cam profile switching mechanism jammed in the engaged position on Bank 2
Typical repair costs for P003F range from $200 to $1,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Drivable but with caution. Rough idle and potential stalling at low RPMs are the main concerns. The aggressive cam profile at idle can reduce engine vacuum, which may affect brake booster assist. Be mindful of longer braking distances at low speed and potential stalling in stop-and-go traffic.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P003F to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing
Difficulty
Type
Generic (SAE)
Recommended Tools
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