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

WARNING: This page is about a different variant/trim than selected.

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

CAUTION: After servicing or replacing faulty parts, perform Clear Memory Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Clear Memory Mode>OPERATION . and Inspection Mode Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Inspection Mode>PROCEDURE .

CHECK FOR ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?
- Yes: Check the appropriate DTC using the "List of Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (H4DO)>List of Diagnostic Trouble Code (DTC) .
- No: Go to 2.
CHECK DATA MONITOR.
1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor or a general scan tool, read the value of [Ambient Temperature Sensor Signal].
  NOTE:
  - Subaru Select Monitor
    For detailed procedures, refer to "Data Monitor". Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Subaru Select Monitor .
  - General scan tool
    For detailed operation procedures, refer to the general scan tool operation manual.
3. Read the change of the value in [Ambient Temperature Sensor Signal] while heating and cooling the ambient sensor using a hair dryer.
CAUTION: 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 Temperature Sensor Signal] change between heating and cooling?
- Yes: Repair the poor contact of ECM connector.
- No: Replace the ambient sensor. Ref. to HVAC SYSTEM (HEATER, VENTILATOR AND A/C)>Ambient Sensor .