Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | 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 VoltageDTC P0193 00: Fuel Rail Pressure (FRP) Sensor Circuit High Voltage
Diagnostic Fault Information
Circuit | Short to Ground | Open or High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Fuel Rail Pressure (FRP) Sensor Signal | P0192 00 | P0191 00 or P0193 00 | P0193 00 | P0191 00 |
Circuit/System Description
The fuel pump 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 4.9 V or below 0.1 V. |
| • | 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
DTC P0192 and P0193 are B type DTCs.
Conditions for Clearing the DTC
DTC P0192 and P0193 are B type DTCs.
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.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
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. |
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the fuel line pressure sensor.
- Ignition OFF, test for less than 1.0 ohm of resistance between the low reference circuit terminal 2 and ground.
- Ignition ON, test for 4.8 - 5.2 volts between the fuel line pressure sensor 5 volt reference circuit terminal 3 and ground.
- Ignition ON, observe the Fuel Pump Control Module Fuel Rail Pressure Sensor parameter.
- Install a 3 A fused jumper wire between the 5 volt reference circuit terminal 3 and the fuel line pressure sensor signal circuit terminal 1. The scan tool should display between 4.8 - 5.2 volts.
- If all circuits test normal, replace the fuel rail pressure sensor.
| ⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the fuel system control module. |
| ⇒ | If less than the specified range, test the 5 volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the fuel system control module. |
| ⇒ | If greater than the specified range, test the 5 volt reference circuit for a short to voltage. If the circuit tests normal, replace the fuel system control module. |
| ⇒ | If less than the specified range, test the signal circuit terminal 1 for a short to ground or an open/high resistance. If the circuit tests normal, replace the fuel system control module. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for FPCM replacement, setup, and programming |
DTC P0192 or P0193 FPCM
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | 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: Fuel Rail Pressure (FRP) Sensor Circuit Low VoltageDTC P0193: Fuel Rail Pressure (FRP) Sensor Circuit High Voltage
Diagnostic Fault Information
Circuit | Short to Ground | Open or High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
5-Volt Reference | P0641 | P0641, P06A6 | P0641 | P06A6 |
Fuel Rail Pressure (FRP) Sensor Signal | P0192 | P0191, P0192 | P0193 | P0191 |
Fuel Line Pressure Sensor Low Reference | -- | P0641, P06A6 | -- | P06A6 |
Circuit/System Description
The fuel pressure sensor is mounted on the fuel line. Fuel pressure is measured by the fuel pressure sensor. The fuel pump flow control module (FPCM) monitors the voltage signal from the fuel pressure sensor and also supplies the voltage and the ground of the fuel pressure sensor.
Conditions for Running the DTC
The ignition is on.
Conditions for Setting the DTC
The FPCM detects that the fuel rail pressure (FRP) sensor signal circuit is above 4.9V or below 0.1V.
Action Taken When the DTC Sets
DTC P0192 and P0193 are A type DTCs.
Conditions for Clearing the DTC
DTC P0192 and P0193 are A type DTCs.
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.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the fuel line pressure sensor.
- Ignition OFF, test for less than 1.0 ohm between the low reference circuit terminal 2 and ground.
- Ignition ON, test for 4.8-5.2 volts between the fuel line pressure sensor 5-volt reference circuit terminal 3 and ground.
- Ignition ON, observe the Fuel Pump Control Module Fuel Rail Pressure Sensor parameter.
- Install a 3A fused jumper wire between the 5-volt reference circuit terminal 3 and the fuel line pressure sensor signal circuit terminal 1. The scan tool should display between 4.8-5.2 volts.
- If all circuits test normal, replace the fuel pressure sensor.
| ⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the FPCM. |
| ⇒ | If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the FPCM. |
| ⇒ | If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the FPCM. |
| ⇒ | If less than the specified range, test the signal circuit terminal 1 for a short to ground or an open/high resistance. If the circuit tests normal, replace the FPCM. |
| ⇒ | If greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the FPCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for FPCM replacement, setup, and programming |
