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P2B12 Powertrain

Cylinder 2 Injection Pulse Offset Not Learned

The ECM has not yet learned the per-cylinder injection pulse offset for cylinder 2. Combustion equalisation between cylinders cannot be applied until adaptation completes.

Affected components

  • Fuel injector cyl 2
  • Ecm

Common causes

  • High likelihood: Adaptation lost after battery disconnect or ECM reset
  • Medium likelihood: Injector replaced without learn procedure

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • This code can affect emissions
  • A drive cycle may be required after repair

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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