• | 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. |
Circuit | Short to Ground | High Resistance | Open | Short to Voltage |
---|---|---|---|---|
FRP Signal | P0192 | P0088, P0191 | P0193 | P0193 |
FRP Low Reference | -- | P0191 | P0193 | ¹ |
FRP 5-Volt Reference | P0117, P011A, P0462, P0522, P0652 | P0087, P0191 | P0193 | P0118, P0463, P0653, P2454 |
Fuel Pressure Regulator Solenoid Supply Voltage | P0088, P0090 | P0088 | P0090 | P0087, P0191, P2510 |
¹ Opens circuit fuse or opens circuit. |
The fuel rail pressure (FRP) sensor has a 5-volt reference circuit, a signal circuit, and a low reference circuit. The engine control module (ECM) monitors the voltage on the FRP sensor circuits. When the fuel pressure is high, the signal voltage is high. When the fuel pressure is low, the signal voltage is low. The fuel pressure regulator has a solenoid supply voltage circuit and a solenoid control circuit. The ECM controls the fuel pressure regulator , which regulates high pressure fuel that goes to the fuel injector rails and the injectors.
• | DTCs P0016, P062F, P0116, P0117, P0118, P0192, P0193, P0652 or P0653 are not set. |
• | The ignition is ON, after the engine has been OFF for greater than 20 minutes. |
• | The coolant temperature is warmer than 40°C (104°F). |
OR |
• | The ignition has been OFF greater than 60 seconds. |
• | The fuel temperature is more than 60°C (140°F). |
• | This diagnostic runs continuously within the above conditions. |
The FRP sensor is below 0.352 volt or above 0.650 volt within the Conditions for Running the DTC.
DTC P0191 is a Type A DTC.
DTC P0191 is a Type A DTC.
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
Important:
• You must perform the Circuit/System Verification before proceeding with Circuit/System Testing. • If you cannot duplicate the condition, operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. • Disregard Freeze Frame/Failure Records if the engine RPM parameter displays greater than zero.
⇒ | If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. |
Important: Fuel pressure control will be disable if DTC P0087, P0088, P0192, or P0193 are set. Codes must be cleared to enable the device control.
⇒ | If all circuits test normal, replace the FRP sensor. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, setup, and programming |