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TuningBot DTC Database · v4.37.14

P2C04 Fuel Pressure Regulator D Control Circuit High

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainFuelOBD2

What P2C04 means

P2C04
Fuel Pressure Regulator D Control Circuit High Generic · fuel Data confidence 65%

The control module detected that the signal in the Fuel Pressure Regulator D Control circuit stayed above the expected operating range.

Symptoms

  • Possible hard starting or long cranking
  • Possible reduced power or cutting out
  • MIL illuminated

Possible causes

  • Low-pressure fuel supply fault (pump, filter, lines)
  • High-pressure pump wear or fault
  • Pressure regulator / volume control valve fault
  • Fuel pressure sensor fault
  • Internal leakage (injector return flow too high)

Recommended checks

  • Read specified vs actual rail pressure at cranking, idle and load
  • Check low-pressure supply (pressure/volume) first
  • Check control valve/regulator operation
  • Measure injector return flow where applicable
  • Inspect wiring and connectors of pressure components

Related and nearby codes

Related codes
P2C00P2C01P2C02P2C03
P2C range
P2C05P2C06P2C07P2C08P2C09P2C0AP2C0BP2C0CP2C0DP2C0EP2C0FP2C10P2C11P2C12

How to read P2C04

P

Powertrain: engine, transmission and driveline systems.

2

Generic SAE-standard code: same meaning on every make.

C04

Specific fault index within the subsystem.

Frequently asked questions about P2C04

What does P2C04 mean?

Fuel Pressure Regulator D Control Circuit High. The control module detected that the signal in the Fuel Pressure Regulator D Control circuit stayed above the expected operating range.

Is P2C04 generic or manufacturer-specific?

P2C04 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P2C04 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

Stage 1/2/3 TuningDPF RemovalEGR RemovalAdBlue / SCR RemovalDTC RemovalIMMO OFFSpeed Limiter (Vmax)

Understand the system behind this code: Diagnostic Strategy and DTC Logic

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