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

WARNING: This page is about a different variant/trim than selected.

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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. Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.0 (EXCEPT FOR HEV))>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.

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. For CVT models, set the select lever to "P" range or "N" range, and for MT models, place the 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 of [Mani. Absolute Pressure].
  NOTE:
  - Subaru Select Monitor
    For detailed operation procedures, refer to "Common (Diagnostics)". Ref. to COMMON (DIAG)>DATA MONITOR .
  - General scan tool For detailed operation procedures, refer to the general scan tool operation manual.
  Is the value of [Mani. Absolute Pressure] 73.3 - 106.6 kPa (550 - 800 mmHg, 21.6 - 31.5 inHg, 10.6 - 15.5 psi) at ignition ON, and 20 - 46.7 kPa (150 - 350 mmHg, 5.91 - 13.79 inHg, 2.9 - 6.8 psi) at idling?
  
  Yes: Repair the poor contact of ECM connector.
  
  No: Replace the manifold absolute pressure sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (EXCEPT FOR HEV))>MANIFOLD ABSOLUTE PRESSURE SENSOR .