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P2294

Fuel Pressure Regulator 2 Control Circuit

Electrical fault on the control line to the high-pressure fuel pressure regulator solenoid. Without a working drive signal the rail cannot maintain pressure and the engine may not start or runs in limp-home.

  • Check engine light: Yes
  • Emissions related: Yes
  • Repair difficulty: hard

Symptoms

  • Check engine light on
  • Hard start, no start, or stalling under load
  • Power loss especially at high load or rpm
  • Possible long cranking time

Common causes

Ordered by how often each turns out to be the cause.

  • Regulator solenoid open or shortedCommon
  • Wiring break to regulatorPossible

Parts involved

  • Fuel Pressure Regulator
  • Fuel Pressure Regulator Wiring

P2294 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.