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P2289

Injector Control Pressure Too High - Engine Off

ICP remains above threshold after engine shutdown — pressure does not bleed off as expected, indicating a stuck check valve or sensor offset error.

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

Common causes

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

  • Check valve stuckCommon

Parts involved

  • Injection Pressure Regulator
  • Injector Control Pressure Sensor

P2289 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.