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

1. - 

DTC detecting condition: 

Detected when two consecutive driving cycles with fault occur.

Trouble symptom: 

• Improper idling
• Poor driving performance

1. 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]. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .

      Is DTC other than P0111 displayed? (Current malfunction)

      Yes  : Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (H4DO)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

      No  : Go to  2 .

2. CHECK DATA MONITOR  .
   1. Using the Subaru Select Monitor, read the value in [Intake Air Temperature].
      NOTE:

      For detailed operation procedures, refer to "Common (Diagnostics)". Ref. to  COMMON (DIAG)>DATA MONITOR  . 

   2. Read the change of the value in [Intake Air Temperature] while heating and cooling the mass air flow and intake air temperature 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 [Intake Air Temperature] 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) (H4DO)>MASS AIR FLOW AND INTAKE AIR TEMPERATURE SENSOR .