Coiling Temperature Sensor - Faulty Input

The computer expects to see a specific voltage from the coiling temperature sensor that measures how hot the coil gets, usually around 0.5 to 4.5 volts depending on the heat level, but it’s getting a voltage that’s too low or too high.

The expected input voltage from the coiling temperature sensor should fluctuate based on temperature, typically ranging between 0.5 volts (cold) to 4.5 volts (hot). If the voltage is stuck below 0.2 volts or above 4.8 volts, the system flags an error.

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 1Inspect wiring and connectors for visible damage or corrosion. Repair as necessary.
2. 2Check the resistance of the coiling temperature sensor. Expected resistance should be within manufacturer specifications under certain temperatures.
3. 3With the engine running, measure voltage at the sensor. It should be between 0.5-4.5 volts. If not, replace sensor if outside range.
4. 4If the sensor is okay, check the ECU for fault or damage, ensuring it is working properly.

• Wiring issues (frayed, shorted, or broken wires)
• Connector problems (corrosion or loose connections)
• Faulty coiling temperature sensor
• ECU malfunction

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