OBD-II code · Powertrain (generic, extended)
P2102 Throttle Actuator Control Motor Circuit Low
Drive voltage to the throttle motor is below the lower limit. Typically a short to ground or a failed driver stage in the ECU.
Is it safe to drive with P2102?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyDrive line shorted to ground
- PossibleThrottle motor internal short
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Throttle Actuator Motor, Throttle Body Wiring, Ecm
Related codes
- P2100Throttle Actuator Control Motor Circuit Open
- P20FFReductant Control Module Performance
- P2101Throttle Actuator Control Motor Circuit Range/Performance
- P2103Throttle Actuator Control Motor Circuit High
- P2104Throttle Actuator Control System — Forced Idle
- P2105Throttle Actuator Control System — Forced Engine Shutdown
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.