Those are GLOW plug failure codes.

P1 365 is for glow plugs #1 or 2 & P1 367 is for glow plugs #3 or 4

The "relay" looks for current draw every time they function.

Each plug draws approx 20A when cold & approx 15A when hot.

Multiply that times 6 & you get approx 120A cold. Checking with an inductive ammeter is the best way to diagnosis.

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