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P2118 — Throttle Actuator Control Motor Current Rangeperformance

Manufacturer-specificPowertrain (engine & transmission)

This code indicates the powertrain control module (PCM) has detected that the electrical current drawn by the electronic throttle actuator motor is outside the expected range, or that the motor’s response is inconsistent with commanded inputs. The fault typically points to an inability to properly control the throttle plate position.

Symptoms

What causes it — most likely first

1. Internal throttle actuator motor failure

The DC motor or its internal position sensors within the throttle body assembly have worn out or burned out, preventing proper current draw and plate movement. This is the most frequent root cause.

2. Wiring or connector faults

Opens, shorts-to-ground, shorts-to-voltage, or high resistance in the harness between the PCM and throttle actuator, often caused by corrosion, chafing, or pin-tension issues at the connectors.

3. Mechanical throttle plate binding

Excessive carbon buildup, debris, or physical damage preventing the throttle blade from moving freely, causing the motor to draw abnormal current as it struggles to overcome resistance.

4. PCM actuator driver circuit failure

The output driver within the control module that supplies current to the throttle motor has failed. This is statistically uncommon and should only be considered after verifying the throttle body and wiring integrity.

How it's diagnosed

  1. Perform a visual inspection of the throttle body and its electrical connector for corrosion, damage, or displaced terminals; inspect harness routing for chafing.
  2. Manually verify the throttle plate moves smoothly through its full range without binding or excessive drag; clean if carbon buildup is present and retest.
  3. Using a multimeter or scope, check the throttle actuator motor resistance and current draw against manufacturer specifications; compare commanded vs actual position signals.
  4. Perform continuity and isolation tests on the motor control circuits between the PCM and throttle body to identify opens or shorts.
  5. If all hardware and wiring tests pass, monitor PCM command outputs to confirm proper signal generation before considering module replacement.

Code facts & related codes

SystemPowertrain (engine & transmission)
StandardizationManufacturer-specific (P1/B1/C1/U1)
Related codesP2110 — Throttle Actuator Control System ForP2111 — Throttle Actuator Control System StuP2112 — Throttle Actuator Control System StuP2113 — Throttlepedal Position Sensor B MinimuP2114 — Throttlepedal Position Sensor C MinimuP2115 — Throttlepedal Position Sensor D Minimu

Frequently asked

Can I just clean the throttle body to fix P2118?

Cleaning may resolve the code if the issue is mechanical binding from carbon deposits. However, if the internal motor windings or sensors have failed, cleaning will not repair the actuator and the assembly must be replaced.

Is it safe to drive with this code active?

No. The vehicle may enter a reduced-power limp mode, stall unexpectedly, or have unresponsive acceleration, creating a safety hazard. Limited driving to a repair facility is possible, but immediate diagnosis is recommended.

Do I need to replace the PCM (computer) for this code?

Rarely. P2118 is most commonly caused by a faulty throttle actuator or wiring issues. PCM failure is uncommon; only consider it after thoroughly testing the throttle body, verifying mechanical operation, and confirming wiring integrity.

What does 'Current Range/Performance' specifically mean?

It means the PCM monitors the amperage flowing to the throttle motor and expects a specific signature for each commanded position. If the current is too high (indicating a short or binding), too low (indicating an open circuit), or erratic, this code sets.