Code Definition

P2100 — Throttle Actuator Control Motor Circuit Open

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P2100

P2100 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P2100 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P2100 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

DTC P2100 indicates an open circuit in the throttle actuator control motor circuit. The control module positions the electronic throttle plate by driving the throttle actuator control motor through a pair of control wires, monitoring current and position feedback to confirm the plate responds. The code sets when the module detects an open in this motor circuit, so the commanded drive does not produce the expected current or movement. With the motor circuit open the throttle cannot be controlled normally, and the system usually enters a failsafe or limp mode with reduced power, a forced idle, a...

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