Code Definition

P2101 — Throttle Actuator Control Motor Circuit Range/Performance

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

About P2101

P2101 is a generic (obd-ii standard) powertrain diagnostic trouble code recorded for Holden vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P2101 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

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 P2101 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

The Engine Control Module (ECM) controls the electronic throttle body using the throttle actuator control (TAC) motor and monitors throttle position via dual throttle position sensors. DTC P2101 is set when the ECM detects that the actual throttle position does not follow the commanded position within a calibrated range during operation. This indicates that the TAC motor circuit or mechanical throttle movement is outside expected performance limits, without a complete open or short circuit being present. When set the throttle usually defaults to a limited limp mode, with reduced power, a fixed...

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