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.
P2107 - Electronic Throttle Control Module Processor: Notes
For a complete wiring diagram, refer to appropriate 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 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:<< With the ignition on and the ETC Motor is not in Limp Home mode.
- >>Set Condition:<< When the Powertrain Control Module (PCM) detects an internal error or a short between the ETC Motor - and ETC Motor + circuits in the ETC Motor Driver. One trip fault. ETC light is flashing.
| Possible Causes |
|---|
| THROTTLE PLATE / BORE INSPECTION |
| (K124) ETC POSITIVE CIRCUIT SHORTED TO VOLTAGE |
| (K126) ETC NEGATIVE CIRCUIT SHORTED TO VOLTAGE |
| (K124) ETC POSITIVE CIRCUIT SHORTED TO THE (K126) ETC NEGATIVE CIRCUIT |
| (K124) ETC POSITIVE CIRCUIT OPEN |
| (K124) ETC POSITIVE CIRCUIT SHORTED TO GROUND |
| (K126) ETC NEGATIVE CIRCUIT OPEN |
| (K126) ETC NEGATIVE CIRCUIT SHORTED TO GROUND |
| LOW BATTERY VOLTAGE |
| ETC MOTOR/THROTTLE BODY |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to Engine .
NO RELATED
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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.