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 SENSOR  .
   1. Start the engine and warm up engine until coolant temperature is higher than 75°C (167°F).
   2. Place the select lever in "P" range or "N" range.
   3. Turn the A/C switch to OFF.
   4. Turn all the accessory switches to OFF.
   5. Read the value of «Mani. Absolute Pressure* using the Subaru Select Monitor or a general scan tool.
      NOTE:

      • Subaru Select Monitor

        For detailed operation procedures, Refer to "Current Data Display For Engine". Ref. to ENGINE (DIAGNOSTICS) (H4DO)>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 20.0 - 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 sensor. Ref. to FUEL INJECTION (FUEL SYSTEM(H4DO)>MANIFOLD ABSOLUTE PRESSURE SENSOR .