Throttle Actuator B Control Motor Circuit/Open
The drive circuit of throttle actuator motor B is open. Throttle B is the secondary throttle on engines with two throttle bodies — typically used for tumble flap or charge-motion control.
Affected components
- Throttle actuator b
- Throttle motor b
- Throttle harness
Common causes
- High likelihood: Motor winding open
- Medium likelihood: Open wire to motor
- Low likelihood: Pin pushed back out of connector body
Possible symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.