P0073low severityPowertrain
Ambient Air Temperature Sensor Circuit High
on 2009 Subaru Legacy 2.5L H4 · AWD
What this code means
The ambient air temperature sensor circuit voltage is higher than expected.
Symptoms
- Check Engine Light
- Very low temp display
Common causes
- Open circuit
- Faulty sensor
- Disconnected connector
Diagnostic steps
- Test circuit voltage
- Check connector
- Test sensor resistance
Repair notes
Repair open circuit or replace sensor.
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