P0192

DTC P0192 or P0193

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0192 00
- Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage

DTC P0193 00
- Fuel Rail Pressure (FRP) Sensor Circuit High Voltage

Diagnostic Fault Information






Circuit/System Description

The fuel pump flow control module (FPCM) monitors the voltage signal from the fuel pressure sensor. These DTCs will set if the FPCM detects that the FRP sensor voltage is out of range.

Conditions for Running the DTC

The engine is running and the fuel pressure is within normal operating range.

Conditions for Setting the DTC

* The FSCM detects that the FRP sensor signal circuit is above 4.9V or below 0.1V.
* DTC P0231, P0232, P023F, P064A, P1255 or P06A6 are not active.
* DTC P0641 has not failed this ignition cycle.
* Fuel pump control is enabled and the fuel pump control state is normal.

Action Taken When the DTC Sets

* The malfunction indicator lamp (MIL) will illuminate.
* The FPCM records the operating conditions at the time the diagnostic fails. The FPCM stores this information in the Failure Records.

Conditions for Clearing the DTC

* A last test failed, or the current DTC, clears when the diagnostic runs and does not fail.
* A history DTC clears after 40 consecutive warm-up cycles, if failures are not reported by this or any other emission related diagnostic.

Diagnostic Aids

Using the Failure Records data may help locate an intermittent condition. If you cannot duplicate the DTC, the information in the Failure Records can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can help determine how many ignition cycles that the diagnostic test reported a pass and/or a fail.

Circuit/System Testing

Test the fuel line pressure sensor signal circuit for a short to ground, a short to voltage or an open.

If the circuit tests normal, replace the fuel pressure sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Fuel Pressure Sensor Replacement