P2100Throttle Actuator A Control Motor Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2100 reports an electrical fault in the drive circuit of the first electronic throttle motor, usually an open line. Ford's 2012 summary uses it for an open circuit or a short to power or ground (no MIL, wrench lamp). GM's 2023 table 23OBDG07 checks the bank 1 H-bridge three ways: open load above 200 kOhm, driver overtemperature and short to ground below 0.5 Ohm, each in one trip. Ford's 2024 summary even uses P2100 as the base code for several throttle faults with failure-type bytes. Ducati reports P2100 for the front-bank throttle motor of its V4. The throttle springs to limp position, so the engine runs with little power. Wrong position is P2101; low/high circuit are P2102/P2103; the B actuator is P210A.
- What you may notice
- Throttle held in limp position, very low power
- Engine or ETC warning lamp on
- Little or no response to the accelerator pedal
- Likely causes
- LikelyMoisture or corrosion in the throttle body or ECU connector
- PossibleBroken or chafed motor wire between ECU and throttle body
- PossibleOpen winding or worn brushes in the throttle motor
- RareDamaged H-bridge output stage in the engine control unit
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.