P0190-FUEL PRESS SENSOR SIGNAL VOLTAGE TOO LOW

For a complete wiring diagram Refer to Section 8W

• When Monitored:

  With the ignition on.

• Set Condition:

  The Fuel Rail Pressure Sensor signal voltage is below 0.2 volt.

Diagnostic Test

NOTE: If DTC P0641, P0651 or P0697 is present with this DTC, diagnose DTCs P0641, P0651 or P0697 before diagnosing this DTC.

WARNING: THE FUEL INJECTION PUMP SUPPLIES HIGH-PRESSURE FUEL TO EACH INDIVIDUAL INJECTOR THROUGH HIGH-PRESSURE FUEL LINES. FUEL UNDER HIGH PRESSURE CAN PENETRATE SKIN AND CAUSE PERSONAL INJURY. WEAR SAFETY GOGGLES AND ADEQUATE PROTECTIVE CLOTHING.

NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.

NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.

• Go To2

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

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

• Go To3

• Go To4

• Repair the Fuel Pressure Sensor Signal circuit for a short to ground.
• Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

• Go To5

• Repair the Fuel Pressure Sensor Signal circuit for a short to the Fuel Pressure Sensor Ground circuit.
• Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

• Replace and program the Engine Control Module in accordance with the Service Information.
• Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).