A Camshaft Profile Actuator B Control Stuck On Bank 1
The control circuit of camshaft profile actuator B on the intake side of bank 1 reports a control stuck on condition. Cam profile B (high-lift or VTEC-style) cannot be commanded reliably.
Affected components
- A camshaft profile actuator b b1
- Wiring harness
- Ecm
Common causes
- High likelihood: Actuator stuck in high-lift position
- Medium likelihood: Release pressure path blocked
- Low likelihood: Carbon or debris buildup preventing free movement
Possible symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.