DTC P0111 Intake Air Temperature Sensor 1 Circuit Range/Performance Bank 1: Notes

DTC detecting condition: 

Detected when two consecutive driving cycles with fault occur.

Trouble symptom: 

• Improper idling
• Poor driving performance
  CAUTION: After servicing or replacing faulty parts, perform Clear Memory Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Clear Memory Mode>OPERATION . and Inspection Mode Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Inspection Mode>PROCEDURE .

1. 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) (H4DOTC)>List of Diagnostic Trouble Code (DTC) .
   • No  : Go to 2. 
2. CHECK CURRENT DATA. 
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor or a general scan tool, read the value of [Intake Air Temperature (B1S1)].
      NOTE:

      • Subaru Select Monitor

        For detailed procedures, refer to "Data Monitor". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>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 Intake Air Temperature (B1S1) while heating and cooling the mass air flow and intake air temperature 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 [Intake Air Temperature (B1S1)] change between heating and cooling?

   • Yes  : Repair the poor contact of ECM connector.
   • No  : Replace the mass air flow and intake air temperature sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>Mass Air Flow and Intake Air Temperature Sensor .