P0117moderate severityPowertrain
ECT Sensor 1 Circuit Low Input
on 2000 Ford Thunderbird 5.0L V8 · FWD
What this code means
The ECT sensor voltage is lower than expected, indicating very high temperature or short.
Symptoms
- Check Engine Light
- Fans running constantly
- Incorrect high temp reading
Common causes
- Short to ground
- Faulty sensor
- Damaged wiring
Diagnostic steps
- Test sensor resistance
- Check for shorts
- Inspect wiring
Repair notes
Repair short or replace sensor.
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