Throttle Actuator Control System - Ice Blockage (Bank 1)
The electronic throttle on bank 1 is jammed by ice — typical at very low ambient temperatures with high humidity, after a short trip that did not warm the throttle housing. The strategy attempts a self-clearing motion before setting the code.
Affected components
- Electronic throttle body
- Throttle position sensor
Common causes
- High likelihood: Ice formed in throttle body
- Medium likelihood: Throttle housing coolant warming circuit blocked
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
- A drive cycle may be required after repair
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.