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P2291 Powertrain

Injector Control Pressure Too Low - Engine Cranking

During cranking, ICP does not build up enough to fire injectors. Typical no-start condition on HEUI engines from a stuck-open IPR or weak HP oil pump.

Affected components

  • Injection pressure regulator
  • High pressure oil pump

Common causes

  • High likelihood: HP oil rail does not pressurise

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • This code can affect emissions
  • Reduced-power or limp mode may occur

Related codes

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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