Code Definition

P2118 — Throttle Actuator Control Motor Current Range / Performance

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

About P2118

P2118 is a generic (obd-ii standard) powertrain diagnostic trouble code recorded for Toyota vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P2118 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 P2118 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 drives the electronic throttle motor through an H bridge output stage and monitors the current flowing through that circuit as a direct measure of how hard the motor is working. Comparing actual current against the value expected for a given commanded movement lets the module judge whether the throttle is moving freely, and it is this comparison rather than a simple voltage check that underpins the fault. DTC P2118 sets when the measured motor current falls outside the acceptable range for the commanded position change, either running high because the plate is draggin...

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