P0068

P0068-MANIFOLD PRESSURE/THROTTLE POSITION CORRELATION

For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
With the engine running, battery voltage greater than 10.4 volts and no MAP sensor or throttle position sensor DTCs.

- Set Condition:
The PCM detects that the MAP sensor value is not within an acceptable range based on the throttle position.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Initial Inspection and Diagnostic Overview

Diagnostic Test

1. DTC IS ACTIVE
Turn the ignition on.
With the scan tool, select View DTCs and review the DTC environmental information.
Is the good trip counter greater than 0?

Yes

- The DTC is not active at this time. Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.Checking for an Intermittent DTC

No

- Go to 2

2. CHECKING THE MAP SENSOR OPERATION

NOTE: Diagnose and repair any MAP sensor or throttle position sensor circuit DTCs before continuing with this test.

Perform the diagnostic procedure for *CHECKING THE MAP SENSOR OPERATION.Checking the MAP Sensor Operation
Were any problems found?

Yes

- Repair as necessary.
- Perform the PCM Verification Test.PCM Verification Test

No

- Go to 3

3. CHECKING THE THROTTLE POSITION SENSOR OPERATION
Perform the diagnostic procedure for *CHECKING THE THROTTLE POSITION SENSOR OPERATION.Checking the Throttle Position Sensor
Were any problems found?

Yes

- Repair as necessary.
- Perform the PCM Verification Test.PCM Verification Test

No

- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.Checking for an Intermittent DTC