Possible Causes
The P1194 code may be triggered for the following reasons:
- Faulty Electronic Throttle System (ETS) motor.
- General ETS system malfunction.
- ETS unit failure.
- Open or shorted ETS system wiring harness.
- Poor electrical connection in the ETS circuit.
How to Fix Code P1194?
- Visual Inspection:
- Check the wiring harness and connectors associated with the ETS system.
- Look for damage such as exposed wires, corroded connectors, or broken pins.
- Diagnose Key Components:
- Test the ETS motor for failure.
- Check the Accelerator Position Sensor (APS) and Throttle Position Sensor (TPS).
- Ensure the Limp return valve is functioning correctly.
- Specific Procedures:
- If a poor connection or short circuit is detected, repair or replace the affected wires and connectors.
- If the ETS unit or a component like the ETS motor is faulty, replace the defective parts.
Possible Symptoms
- Engine light on (or “Check Engine” warning light activated).
- The engine may stall or operate in limp mode.
Meaning of Code P1194
The Electronic Throttle System (ETS) controls acceleration via electrical signals rather than a mechanical cable. It consists of several components:
- ETS Unit: Coordinates signals and commands.
- ETS Motor: Adjusts the throttle position.
- APS and TPS Sensors: Monitor the accelerator and throttle positions.
- Limp Return Valve: Located under the throttle body, it allows air to flow to prevent the engine from stalling if a problem is detected by the PCM (Powertrain Control Module).