DTC P0068: Map/MAF - Throttle Position Correlation: Notes

DTC detecting condition: 

Detected when two consecutive driving cycles with fault occur.

1. CHECK AIR INTAKE SYSTEM. 

   Check the air intake system.

   Are there holes, loose bolts or disconnection of hose on air intake system?

   Yes:  Repair the air intake system.

   No:  Go to  2.

2. CHECK MANIFOLD ABSOLUTE PRESSURE AND INTAKE AIR TEMPERATURE SENSOR. 
   1. Start the engine and warm up engine until coolant temperature is higher than 75°C (167°F).
   2. For CVT models, set the select lever to "P" range or "N" range, and for MT models, place the gear shift lever in the neutral position.
   3. Turn the A/C switch to OFF.
   4. Turn all the accessory switches to OFF.
   5. Using the Subaru Select Monitor or a general scan tool, read the value in «Mani. Absolute Pressure*.
      NOTE:

      • Subaru Select Monitor

        For detailed operation procedures, refer to "Read Current Data For Engine". Refer to ENGINE (DIAGNOSTICS) (W/O STI)>SUBARU SELECT MONITOR .

      • General scan tool

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

   Is the value in «Mani. Absolute Pressure* 73.3 - 106.6 kPa (550 - 800 mmHg, 21.65 - 31.50 inHg) when the ignition is turned ON, and 20 - 46.7 kPa (150 - 350 mmHg, 5.91 - 13.78 inHg) during idling?

   Yes:  Repair the poor contact of ECM connector.

   No:  Replace the manifold absolute pressure and intake air temperature sensor. Refer to FUEL INJECTION (FUEL SYSTEMS) (W/O STI)>MANIFOLD ABSOLUTE PRESSURE AND INTAKE AIR TEMPERATURE SENSOR .