DTC P0068 Map/MAF - Throttle Position Correlation

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

DTC DETECTING CONDITION:

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

CAUTION: After repairing or replacing the defective part, perform the Clear Memory Mode < Ref. to OPERATION , Clear Memory Mode. > and Inspection Mode < Ref. to PROCEDURE , Inspection Mode. >.

WIRING DIAGRAM:

Fig 1: MAP/MAF - Throttle Position Correlation - Wiring Diagram

DIAGNOSIS PROCEDURE

Step	Check	Yes	No
1 CHECK ANY OTHER DTC ON DISPLAY.	Is any other DTC displayed?	Check DTC using "List of Diagnostic Trouble Code (DTC)". < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >	Go to step 2.
2 CHECK AIR INTAKE SYSTEM.	Are there holes, loose bolts or disconnection of hose on air intake system?	Repair the air intake system.	Go to step 3.
3 CHECK MANIFOLD ABSOLUTE PRESSURE SENSOR. Start the engine and warm-up engine until coolant temperature is greater than 60°C (140°F). Place the select lever or shift lever in "P" or "N" range. Turn the A/C switch to OFF. Turn all the accessory switches to OFF. Read the data of intake manifold pressure sensor signal using Subaru Select Monitor or general scan tool. NOTE: Subaru Select Monitor For detailed operation procedure, refer to "READ CURRENT DATA FOR ENGINE". < Ref. to SUBARU SELECT MONITOR . > General scan tool For detailed operation procedures, refer to the "General Scan Tool Instruction Manual".	Is the measured value 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?	Go to step 4.	Replace the manifold absolute pressure sensor. < Ref. to MANIFOLD ABSOLUTE PRESSURE SENSOR . >
4 CHECK THROTTLE OPENING ANGLE. Read the data of throttle position signal using Subaru Select Monitor or general scan tool. NOTE: Subaru Select Monitor For detailed operation procedure, refer to "READ CURRENT DATA FOR ENGINE". < Ref. to SUBARU SELECT MONITOR . > General scan tool For detailed operation procedures, refer to the "General Scan Tool Instruction Manual".	Is the measured value less than 5% when throttle is fully closed?	Go to step 5.	Adjust or replace the throttle position sensor. < Ref. to THROTTLE POSITION SENSOR . >
5 CHECK THROTTLE OPENING ANGLE.	Is the measured value more than 85% when throttle is fully open?	Replace the manifold absolute pressure sensor. < Ref. to MANIFOLD ABSOLUTE PRESSURE SENSOR . >	Replace the throttle position sensor. < Ref. to THROTTLE POSITION SENSOR . >