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

1. -

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Refer to ENGINE (Diagnostics) (H4DO)>Basic Diagnostic Procedure>PROCEDURE .

CHECK AIR INTAKE SYSTEM .
Check the installing condition of the air intake system.

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

Yes : Repair the air intake system. Refer to INTAKE (INDUCTION) (H4DO)>General Description .

No : Go to 2.
CHECK MANIFOLD ABSOLUTE PRESSURE SENSOR .
1. Start the engine and warm up until the engine coolant temperature exceeds 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. Using the Subaru Select Monitor, read the value in [Mani. Absolute Pressure].
  NOTE: For detailed operation procedures. Refer to "Common (Diagnostics)". Refer to COMMON (DIAG)>DATA MONITOR .
Is the value of [Mani. Absolute Pressure] 73.3 - 106.6 [kPa] (550 - 800 mmHg, 21.6 - 31.5 inH g, 10.6 - 15.5 psi) at ignition ON, and 20 - 46.7 [kPa] (150 - 350 mmHg, 5.91 - 13.79 inH g, 2.9 - 6.8 psi) at idling?

Yes : Repair the poor contact of ECM connector.

No : Replace the manifold absolute pressure sensor. Refer to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Manifold Absolute Pressure Sensor .