P0117moderate severityPowertrain
ECT Sensor 1 Circuit Low Input
on 2004 Subaru Legacy 3.0L H6 · AWD
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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1