DTC P0088-22: Fuel Rail/System Pressure - Too High Bank 1 - Signal amplitude > maximum: Action

WARNING: This page is about a different car, the 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For vehicles compliant with EU6 emission standards please follow the guided flow processes and the three high pressure diesel applications below. If the fault persists after completing the applications continue with further repair actions of this DTC.

Using the Jaguar Land Rover approved diagnostic equipment, access and complete the following guided flow diagnostic tests to confirm the presence of a fuel system fault:
- Diesel High Pressure Pump Test
- Test High Pressure Unit Delivery Rate
- Injector shut off test
If the fault persists, complete the repair actions below
Check powertrain control module for fuel pressure related DTCs and refer to relevant DTC index
Check fuel lines for restrictions and repair as required
Check fuel lines for leakage and repair as required
Diagnosis of this DTC may require using the Jaguar Land Rover approved diagnostic equipment to check datalogger signals
- 0x0324 Fuel Rail Pressure Sensor - Volts
- 0x03DC Fuel Rail Pressure - Desired - KPa
- 0xF423 Fuel Rail Pressure - KPa
- Set the engine running
- Monitor fuel rail pressure
- Set the ignition to OFF. Fuel rail pressure should decrease
- If the fuel rail pressure does not decrease possible stuck valve in fuel pump
Refer to the electrical circuit diagrams and check the rail pressure sensor circuit for short circuit to ground, short circuit to power, open circuit, high resistance
Refer to the electrical circuit diagrams and check the fuel pressure control valve circuit for short circuit to ground, short circuit to power, open circuit, high resistance
Inspect connectors for signs of water ingress, and pins for damage and/or corrosion
Install a new fuel rail pressure sensor, only when diagnosed as failed
Install a new fuel pressure control valve, only when diagnosed as failed
Check fuel pump - high pressure for mechanical integrity
- Fuel volume control valve
Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest