P2072
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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Common causes
Ordered by how often each turns out to be the cause.
- Ice formed in throttle bodyCommon
- Throttle housing coolant warming circuit blockedPossible
Parts involved
- Electronic Throttle Body
- Throttle Position Sensor
P2072 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.