Powertrain
generic / SAE
P2105
Throttle Actuator Control System — Forced Engine Shutdown
The TAC monitor commanded an engine shutdown because throttle authority can no longer be guaranteed safely. The most aggressive TAC limp mode — used when both throttle position sensors disagree or the motor is uncontrollable.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number1 / 05
Possible causes
- TPS1 and TPS2 disagree beyond limit high
- Throttle motor not controllable medium
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1200 €
- Estimated time: 1–5 h
- Component: throttle actuator control
- Component: throttle position sensor
- Component: ecm
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012