What Does P005A Mean?
The PCM has detected that the 'B' camshaft profile control system on Bank 1 is not performing as expected or is stuck in the off (deactivated) position. This relates to a variable valve timing or variable valve lift system (such as Honda's VTEC, GM's Active Fuel Management, or similar) that changes the camshaft profile for improved performance and efficiency. The driver may notice reduced power at higher RPMs, decreased fuel economy, or a rough-running condition depending on which profile is stuck.
Common Causes
30%
Failed or stuck cam profile switching solenoid/actuator
25%
Low oil pressure or sludge buildup preventing hydraulic actuation of the cam profile switch
20%
Mechanical failure of the cam profile switching mechanism (locking pin, rocker arm, or lifter)
15%
Wiring or connector issue to the cam profile solenoid
10%
Faulty cam profile position sensor providing incorrect feedback to the PCM
Diagnostic Steps
1
Check the engine oil level and condition — low oil level or degraded oil with sludge buildup is the most common root cause of cam profile switching failures. If the oil is dark, thick, or low, address this first.
2
Monitor live data for the cam profile switch command versus actual status — verify whether the PCM is commanding the switch and the system is failing to respond.
3
Locate the 'B' camshaft profile solenoid on Bank 1 (typically on the valve cover or cylinder head). Disconnect and measure the solenoid coil resistance (usually 6–15 ohms). Check for 12V power and PCM ground control.
4
Use a bi-directional scan tool to command the cam profile solenoid on and off. Listen for the solenoid clicking and monitor the cam profile status PID for a change. No response indicates a stuck mechanism or failed solenoid.
5
If the solenoid operates but the profile does not switch, the issue is likely mechanical — inspect oil passages to the switching mechanism for blockage. On some engines this requires valve cover removal to inspect the rocker arm or lifter switching mechanism.
6
Verify oil pressure meets specification at operating temperature using a mechanical gauge — low oil pressure will prevent hydraulic cam profile actuation.
Estimated Repair Cost
$200 - $1,500
Parts + labor, varies by vehicle and location
The PCM has detected that the 'B' camshaft profile control system on Bank 1 is not performing as expected or is stuck in the off (deactivated) position. This relates to a variable valve timing or variable valve lift system (such as Honda's VTEC, GM's Active Fuel Management, or similar) that changes ...
The most common cause of P005A ("B" Camshaft Profile Control Performance/Stuck Off Bank 1) is: Failed or stuck cam profile switching solenoid/actuator
Typical repair costs for P005A range from $200 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Generally safe to drive but with reduced performance. The engine will operate on the default cam profile, which may result in reduced high-RPM power, decreased fuel economy, or rougher idle. If the oil level is low, continuing to drive risks accelerated engine wear. Check oil level immediately and top off if needed.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P005A to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing / Engine Mechanical
Difficulty
Type
Generic (SAE)
Recommended Tools
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