Powertrain, generic (extended)

P2103 Throttle Actuator A Control Motor Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2103 is the high-side fault of the throttle A drive: the output stage sees a voltage that suggests a short to battery, or on some layouts the supply relay of the throttle motor stays energized when it should be off. GM groups P2100-P2103 as power-limiting faults (18OBDG03A), and its Bosch-based 2012 ECM ties a power-stage short circuit to this range with about 0.1 s detection. Mitsubishi's 2022 Outlander list files P2100 and P2103 under the short name ETC MOT PWR, i.e. the supply of the throttle control motor, stored after one trip. The throttle is de-energized and power limited. Low-side faults are P2102, open circuit P2100.

Likely causes

Motor wire shorted to a battery-voltage feed
Throttle motor relay sticking on (where fitted)
Damaged or wet throttle connector
Internal fault in the ECU throttle driver

Symptoms

  • Limp mode with very limited power
  • Engine warning lamp on
  • Engine may not start or stalls

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–600
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

throttle actuator motorthrottle body wiringecm

Related codes

P2100P2102P2101P2118P210D

References: gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov, law.cornell.edu.