DTC P0072: Ambient Air Temperature Sensor Circuit "A" Low: Notes

DTC detecting condition: 

Immediately at fault recognition

1. CHECK DTC. 

   Read the engine DTC using the Subaru Select Monitor or general scan tool. Refer to ENGINE (DIAGNOSTICS) (STI)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC P0072 or P0073 displayed? (Current malfunction)

   Yes:  Go to  2.

   No:  Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

   NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
2. CHECK COMBINATION METER. 

   Check the combination meter system. Refer to COMBINATION METER (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

   Is the check result OK?

   Yes:  Repair the poor contact of ECM connector.

   No:  Repair the combination meter system. Refer to COMBINATION METER (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .