DTC P0068 Map/MAF - Throttle Position Correlation

WARNING: This page is about a different car, the 2006 Subaru Outback. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTING CONDITION:

Two consecutive driving cycles with fault
GENERAL DESCRIPTION < Ref. to DTC P0068 MAP/MAF - THROTTLE POSITION CORRELATION , Diagnostic Trouble Code (DTC) Detecting Criteria. >

TROUBLE SYMPTOM:

Failure of engine to start

CAUTION: After repair or replacement of faulty parts, perform Clear Memory Mode < Ref. to OPERATION , Clear Memory Mode. > and Inspection Mode < Ref. to PROCEDURE , Inspection Mode. >.

WIRING DIAGRAM:

Fig 1: Manifold Absolute Pressure Sensor - Wiring Diagram

DTC P0068 MAP/MAF - THROTTLE POSITION CORRELATION - DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK IDLE SWITCH SIGNAL. Turn the ignition switch to ON. Operate the LED operation mode for engine using Subaru Select Monitor. NOTE: Subaru Select Monitor For detailed operation procedure, refer to the "LED OPERATION MODE FOR ENGINE." < Ref. to SUBARU SELECT MONITOR . >	Does the LED of {Idle Switch Signal} come on?	Go to step 2.	Check the throttle position sensor circuit. < Ref. to DTC P2135 THROTTLE/PEDAL POSITION SENSOR / SWITCH "A"/"B" VOLTAGE CORRELATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > NOTE: In this case, it is not necessary to inspect DTC P0106.
2 CHECK FOR ANY OTHER DTC ON DISPLAY.	Is any other DTC displayed?	Check the relative DTC. "List of Diagnostic Trouble Code (DTC)" < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > NOTE: In this case, it is not necessary to inspect DTC P0106	Go to step 3.
3 CHECK CONDITION OF MANIFOLD ABSOLUTE PRESSURE SENSOR.	Is the manifold absolute pressure sensor installation bolt tightened securely?	Go to step 4.	Securely tighten the manifold absolute pressure sensor installation bolt.
4 CHECK CONDITION OF THROTTLE BODY.	Is the throttle body installation bolt tightened securely?	Replace the manifold absolute pressure sensor. < Ref. to MANIFOLD ABSOLUTE PRESSURE SENSOR . >	Tighten the throttle body installation bolt securely.