Komatsu · E238
Disconnection in attachment return selector relay
What this code means
Open circuit (disconnection) in the ATT return selector relay circuit.
Applies to: PC200-7 excavator (service code).
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Ask for the replacement part on WhatsAppSource: Komatsu PC200/220(LC)-7 Shop Manual – Testing and Adjusting, service codes table. Cross-checked in two independent sources. Compiled 2026-10-30. No manufacturer affiliation.