P2118
Throttle Actuator Control Motor Current Range/Performance
If your vehicle's onboard computer has flagged the diagnostic trouble code P2118, it refers to a detected anomaly regarding "Throttle Actuator Control Motor Current Range/Performance". This systemic engine fault needs a targeted check before symptoms expand.
Driver's Summary
When your OBD2 scanner shows P2118, the engine control module has flagged an issue specifically related to throttle actuator control motor current range/performance. Drivers typically experience limp mode, no throttle response, mil on when this code is active. Given the high severity of this code, continuing to drive risks significant mechanical damage. Have it diagnosed immediately.
Symptoms
Limp mode, no throttle response, MIL on
Common Causes
- Blown ETCS (Electronic Throttle Control System) fuse
- Binding throttle plate causing high current draw
- Faulty throttle motor
- Wiring short circuit
How to Fix
- 1 Replace blown ETCS fuse
- 2 Clean throttle body to relieve binding
- 3 Replace throttle body
- 4 Repair shorted wiring harness
Technical Explanation
Detection of P2118 occurs when the ECM cross-references multiple sensor inputs and determines that the reported values are physically inconsistent or out-of-range. A two-trip detection strategy is employed for most powertrain codes: the fault must be detected on one drive cycle, the vehicle key-cycled off, and the fault detected again on the next drive cycle before the MIL illuminates and a permanent DTC is stored. The MIL illuminates after the fault is confirmed on two consecutive drive cycles, and the freeze frame data captured at first detection is stored in the PCM's memory for diagnostic reference.
Is It Safe to Drive?
With P2118 active, your engine or transmission is not operating within design parameters. Short-term driving may seem fine, but internal damage is accumulating — particularly to blown etcs (electronic throttle control system) fuse.
Mechanic's Pro Tip
Before replacing any component on P2118, spend 5 minutes inspecting the wiring harness and connector first — corrosion, chafed insulation, and backed-out pins cause the majority of these faults and cost nothing to fix. Use a multimeter to measure voltage drop across the connector pins under load; anything above 0.1V indicates excessive resistance that will cause intermittent failures even after replacing the sensor.
Fuse: $10; Throttle body: $300 - $600