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DTC P0068 MANIFOLD PRESSURE SENSOR RANGE/PERFORMANCE

DTC P0068 MANIFOLD PRESSURE SENSOR RANGE/PERFORMANCE

DTC DETECTING CONDITION:


• Two consecutive driving cycles with fault

• GENERAL DESCRIPTION


Important

After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode .


WIRING DIAGRAM:


CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Yes

Inspect DTC using “List of Diagnostic Trouble Code (DTC)”.


No


CHECK AIR INTAKE SYSTEM.

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

Yes

Repair air intake system.


No


CHECK PRESSURE SENSOR.

Start the engine and warm-up engine until coolant temperature is greater than 60°C (140°F).

Place the selector lever or shift lever in “P” or “N” position.

Turn the A/C switch to OFF.

All accessory switches OFF.

Read the data of intake manifold pressure sensor signal using Vehicle Diagnostic Interface or OBD-II general scan tool.

Note
• Vehicle Diagnostic Interface

For detailed operation procedures, refer to “READ CURRENT DATA FOR ENGINE”.

• OBD-II general scan tool

For detailed operation procedures, refer to the OBD-II General Scan Tool Instruction Manual.


Ignition ON: Is the measured value 73.3 — 106.6 kPa (550 — 800 mmHg, 21.65 — 31.50 inHg)? Idling: Is the measured value 20.0 — 46.7 kPa (150 — 350 mmHg, 5.91 — 13.78 inHg)?

Yes


No

Replace the manifold absolute pressure sensor.


CHECK THROTTLE POSITION.

Read the data of throttle position signal using Vehicle Diagnostic Interface or OBD-II general scan tool.

Note
• Vehicle Diagnostic Interface

For detailed operation procedures, refer to “READ CURRENT DATA FOR ENGINE”.

• OBD-II general scan tool

For detailed operation procedures, refer to the OBD-II General Scan Tool Instruction Manual.


Is the measured value less than 5% when throttle is fully closed?

Yes


No

Adjust or replace the throttle position sensor.


CHECK THROTTLE POSITION.

Is the measured value more than 85% when throttle is wide open?

Yes

Replace the manifold absolute pressure sensor.


No

Replace the throttle position sensor.