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

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) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

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.
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. 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)". Ref. to COMMON (DIAG)>DATA MONITOR .
Is the value of [Mani. Absolute Pressure] 73.3 - 106.6 kPa (550 - 800 mmHg, 21.65 - 31.5 inHg) at ignition ON, and 20 - 46.7 kPa (150 - 350 mmHg, 5.91 - 13.78 inHg) at idling?

Yes : Repair the poor contact of ECM connector.

No : Replace the manifold absolute pressure and intake air temperature sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>MANIFOLD ABSOLUTE PRESSURE AND INTAKE AIR TEMPERATURE SENSOR .