P2100 — Throttle Actuator A Control Motor Circuit/Open

P2100: Throttle Actuator A Control Motor Circuit/Open — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Throttle Actuator A Control Motor Circuit/Open. Basic catalogue definition; diagnostic details have not yet been reviewed.

Affected system: Powertrain

Symptoms

  • The engine warning light may appear with weak or absent accelerator response.
  • A restricted-power operating mode may be activated.

Possible causes

  • A broken conductor, poor connection or faulty throttle actuator can interrupt the motor circuit.
  • Pedal-signal and control-unit faults are additional possibilities that require separate checks.

What to check

  • Read related throttle and pedal codes and inspect actuator wiring and connectors.
  • Check battery supply and ground, then compare pedal and throttle live readings.
  • Test actuator operation with a compatible tool before considering component replacement.

Also written as: P2100-00, P210000 (some scan tools add the fault-type byte, e.g. -00).