B Camshaft Position Actuator Control Circuit Driver Current/Temperature Too High Bank 1
Driver stage controlling the exhaust cam position actuator on bank 1 reports overcurrent or overtemperature. The camshaft position sensor identifies which cylinder is on the compression stroke — without it the ECM cannot run sequential injection or coil-on-plug ignition correctly.
Affected components
- Cam actuator b driver b1
- Cam actuator b b1
Common causes
- High likelihood: Short circuit in actuator wiring or coil
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.