P2103
Throttle Actuator A Control Motor Circuit High
Fuel & air metering (drive-by-wire throttle)
Generic OBD-II
Medium
What it means
P2103 means the PCM detects a higher-than-expected voltage in the circuit that drives the electronic throttle actuator motor — the motor that opens and closes the drive-by-wire throttle plate. It's usually a wiring, connector, or throttle-motor fault, and it commonly forces the engine into a reduced-power or limp mode to keep throttle control safe.
Medium
Can I keep driving? Driveable but often in a limp/reduced-power mode; the throttle may default to a limited opening, so repair it soon.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power / limp (forced-idle) mode
- Poor or unresponsive throttle response
- Rough or unstable idle
Common causes
Most likely first
- Wiring shorted to voltage or open in the throttle actuator motor circuitLikely
- Faulty throttle actuator (drive-by-wire) motorCommon
- Sticking or dirty throttle bodyCommon
- Corroded or loose throttle body connectorLess often
- Faulty powertrain control module (PCM)Less often
How to diagnose & fix
Work through it in order
- Clean the throttle body and clear the code first — carbon buildup is a common, cheap cause.
- Inspect the throttle body connector and wiring for shorts-to-power, opens, or corrosion.
- Test the throttle actuator motor's resistance and operation; replace the throttle body if the motor is faulty.
- Consider the PCM only after the throttle body and wiring test good.
FAQ
Quick answers
Is it safe to drive with P2103?+
Only cautiously. Throttle-actuator faults usually force the engine into reduced-power or forced-idle mode, which limits acceleration. Repair it promptly and avoid highway driving until it's fixed.
Can I just clear P2103?+
It will return until the circuit or throttle fault is repaired. Cleaning the throttle body sometimes clears a carbon-related trip, but a wiring or motor fault will bring it back.
Related codes
Often seen with P2103
Read & clear P2103 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX