DTC P0071: Ambient Air Temperature Sensor Circuit "A" Range/Performance: Notes

1. -

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Refer to ENGINE (Diagnostics) (H4DO)>Basic Diagnostic Procedure>PROCEDURE .

CHECK DTC .
1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Refer to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC other than P0071 displayed? (Current malfunction)

Yes : Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Refer to ENGINE (Diagnostics) (H4DO)>Diagnostic Trouble Code (DTC)>LIST .

No : Go to 2.
CHECK DATA MONITOR .
1. Using the Subaru Select Monitor, read the value in [Ambient Air Temperature] for [Air Conditioner].
  NOTE: For detailed operation procedures. Refer to "Common (Diagnostics)". Refer to COMMON (DIAG)>DATA MONITOR .
2. Read the change of the value in [Ambient Air Temperature] while heating and cooling the ambient sensor using a hair dryer.
  WARNING: Do not heat the part to the temperature where you cannot touch it with your bare hand in order to prevent burning yourself and protect the part.
Does the value of [Ambient Air Temperature] change between heating and cooling?

Yes : Repair the poor contact of ECM connector.

No : Replace the ambient sensor. Refer to AIR CONDITIONER>Ambient Sensor .