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HOMESERVICE MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 12 (ENGINE CONTROLS (H6DO) (DIAGNOSTICS) (1 OF 5))DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)DTC P0071 AMBIENT AIR TEMPERATURE SENSOR CIRCUIT "A" RANGE/PERFORMANCEDTC DETECTING CONDITION
2016 Subaru Legacy 2.5i

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

2016 Subaru Legacy 2.5iSECTION DTC Detecting Condition
WARNING: This page is about a different variant/trim than selected.

Detected when two consecutive driving cycles with fault occur.

CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode < Ref. to OPERATION , Clear Memory Mode. >, and Inspection Mode < Ref. to PROCEDURE , Inspection Mode. >.
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK FOR ANY OTHER DTC ON DISPLAY.  Is any other DTC displayed? Check the appropriate DTC using the "List of Diagnostic Trouble Code (DTC)". < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > Go to step 2  .
2 CHECK CURRENT DATA. 
  1. Turn the ignition switch to ON.
  2. Read the value of «Ambient Air Temperature » using the Subaru Select Monitor or a general scan tool.
    NOTE:
    • Subaru Select Monitor

      For detailed operation procedures, refer to "Current Data Display For HVAC System". < Ref. to READ CURRENT DATA . >

    • General scan tool

      For detailed operation procedures, refer to the general scan tool operation manual.

  3. Read the change of the value in «Ambient Air Temperature» 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 Air Temperature» change between heating and cooling? Repair the poor contact of ECM connector. Replace the ambient sensor. < Ref. to AMBIENT SENSOR . >
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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