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Komatsu PC55MR-5E0 With AS00R3, AS00R4 and #B1231 error codes.

Brian Bobb ยท 2026-01-18 16:16

Does anyone know how I can go about diagnosing and fixing these error codes? The machine is derated.

Replies4
  1. #1Samarskii_ma2026-01-19 03:58

    Hi AS00R3 - Inducement 1 (NOx Control Device Abnormality) AS00R3 - Inducement 2 (NOx Control Device Abnormality) B1231 - Ambient Pressure Sensor Characteristic Error

  2. #2Brian Bobb2026-01-19 04:15

    How can I go about solving these? The machine is derate right now.

  3. #3Jonathan7112026-01-19 18:47

    try looking for information here, quite a large selection of service and operation material for it https://www.jaysliterature.com/shop/39864005/komatsu

  4. #4Brian Bobb2026-01-21 04:04

    Thank you. I managed to get the workshop manual but it has no solution to solving those codes aside from changing the ecm.