What P2103 means
Throttle Actuator A Control Motor Circuit High
How to diagnose
- Read freeze frame data. When P2103 set, your ECU snapshotted every sensor at that moment. This tells you what the car was doing when the fault triggered — RPM, load, coolant temp, throttle position, fuel trims. Almost always enough info to figure out the cause without further testing.
- Check for related codes. If you have P2103 plus other codes, fix the earliest one in the chain first — a single root cause often triggers multiple codes.
- Cheap fixes first. For most codes, the order is: inspect connectors + wiring (free), check for vacuum leaks (cheap), replace sensor (moderate), replace mechanical part (expensive). Follow that ladder before dropping money on parts.
Manufacturer-specific descriptions
Different manufacturers use P2103 for slightly different failure modes:
| BMW | Throttle Actuator Control Motor Circuit High |
| GM | Intake Air Flow Valve Control Circuit Short to Battery |
| MITSUBISHI | ETV motor circuit(shorted high) |
Read P2103 on your own car
DIY Fix My Car reads P2103 plus 25,000+ other DTC codes with manufacturer-specific descriptions. Includes freeze frame data, likely fix parts, and AI mechanic chat. Download free.