B Camshaft Profile Actuator B Control Circuit/Open Bank 1
The control circuit of camshaft profile actuator B on the exhaust side of bank 1 reports a control circuit/open condition. Cam profile B (high-lift or VTEC-style) cannot be commanded reliably.
Affected components
- B camshaft profile actuator b b1
- Wiring harness
- Ecm
Common causes
- High likelihood: Open in actuator control wire
- Medium likelihood: Open actuator coil
- Low likelihood: Pin pushed back out of connector body
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.