Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
P2110 - Electronic Throttle Control - Forced Limited Rpm: Notes
For a complete wiring diagram, refer to Wiring Diagram.
Theory of Operation
The Electronic Throttle Control (ETC) motor is controlled by the Powertrain Control Module (PCM). The DC motor located in the Throttle Body Assembly drives the throttle blade. In order to decrease idle speed, along with spark and fuel delivery changes the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate.
- >>When Monitored:<< Ignition on and ETC motor is working.
- >>Set Condition:<< When the Powertrain Control Module (PCM) requests to limit engine speed if PWM is too high for 25 seconds and before P2118 sets. One trip fault and the code will set within five seconds. ETC light is illuminated.
| Possible Causes |
|---|
| THROTTLE PLATE STUCK |
| (K124) ETC POSITIVE CIRCUIT OPEN |
| (K126) ETC NEGATIVE CIRCUIT OPEN |
| (K124) ETC POSITIVE CIRCUIT SHORTED TO GROUND |
| (K126) ETC NEGATIVE CIRCUIT SHORTED TO GROUND |
| ETC MOTOR/THROTTLE BODY |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to Engine .
NO RELATED
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.