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P codepowertrainMedium severity

P2287Injector Control Pressure Sensor Circuit Intermittent

The injector control pressure (ICP) sensor signal is cutting in and out intermittently, causing erratic high-pressure oil control on HEUI diesel engines.

Definition

The PCM watches the ICP sensor signal for continuity and plausibility while it regulates injection control pressure on HEUI diesel systems (Ford Power Stroke and International engines); P2287 sets when the signal drops out or spikes erratically rather than failing cleanly high or low. Because the PCM chases the erratic feedback with the injection pressure regulator, symptoms are often dramatic and intermittent — bucking, surging, stumbling under load, or momentary stalls — accompanied by an illuminated MIL. The classic root cause is engine oil wicking into the sensor connector and creating an intermittent connection.

Common causes

  • Engine oil wicked into the ICP sensor connector causing intermittent contact
  • Chafed harness insulation shorting intermittently against the engine
  • Loose, spread, or corroded connector terminals
  • Failing ICP sensor with an internal intermittent fault
  • Harness routing that flexes with engine torque, breaking contact under load

Common misdiagnoses

  • Injection pressure regulator (IPR) replaced for surging caused by bad sensor feedback
  • High-pressure oil pump replaced for intermittent pressure complaints
  • Fuel injectors replaced for bucking and stumble symptoms
  • Cam or crank position sensors replaced for intermittent stalling

Troubleshooting steps

  1. 1.Inspect the ICP connector for oil intrusion first

    Unplug the sensor and check for oil inside the connector shell — this is the most common cause and requires replacing the sensor and the pigtail, not just wiping the terminals.

  2. 2.Graph the ICP PID while wiggle-testing the harness

    With the engine idling, flex the pigtail and harness along its route; sudden spikes or dropouts in the graphed signal localize the intermittent connection.

  3. 3.Road-test with the sensor disconnected if symptoms are severe

    In open-loop (sensor unplugged) the engine runs on default IPR duty; if the bucking or surging disappears, the erratic ICP signal was driving the complaint.

  4. 4.Inspect terminal tension and repair wiring

    Check for spread female terminals and green corrosion, and repair chafed sections with proper splices and heat-resistant loom rather than tape alone.

  5. 5.Replace the sensor and pigtail as a pair when oil is present, then verify

    Clear codes and confirm on a road test under load that the ICP signal stays smooth and tracks commanded injection control pressure without dropouts.

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