P2105Throttle Actuator Control System - Forced Engine Shutdown
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- P2105 is the most severe throttle failure mode: the controller has decided that throttle control can no longer be trusted and stops the engine. In Ford's 2012 summary the trigger is a serious processor fault found by the separate monitoring processor (Ford calls it the Quizzer); all injectors are switched off and the wrench lamp comes on. Ford sets it without MIL, arguing that a shutdown cannot raise emissions, which matches the CARB idea of emissions-neutral default actions. The cause sits in the engine computer, its supply or a companion code such as P0606 or P2107. For the driver the engine dies or will not keep running. Milder states are forced idle (P2104), limited power (P2106) and limited rpm (P2110).
- What you may notice
- Engine shuts off or will not keep running
- Wrench or ETC warning lamp, often without MIL
- Likely causes
- LikelyMonitoring processor detects an internal ECU fault
- PossibleUnstable ECU supply or ground connection
- RareECU software fault cured by reprogramming
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.