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Perkins — The rating interlock is a code that prevents the use of

A Perkins service procedure — check it applies to your exact model before use.

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Procedure

  1. The engine will not run.
  2. Diagnostic code 253-2 (Personality Module erratic,

Source: manual:cd0c0b.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.