P0191-FUEL PRESS SENSOR AFTERRUN NEGATIVE PLAUSIBILITY

For a complete wiring diagram Refer to Section 8W

• When Monitored:

  At ignition shut off during Afterrun.

• Set Condition:

  The Fuel Pressure Sensor signal is below 0.298 volt for 1.0 second.

Diagnostic Test

NOTE: This code can be caused by an intermittent problem in the wiring and connectors to the Fuel Pressure Sensor. Inspect the Fuel Pressure Sensor harness connector and associated wiring for signs of poor terminal contact.

• Replace the Fuel Pressure Sensor in accordance with the Service Information.
• Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

• Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)