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Komatsu · CA144
Coolant Temperature Sensor High Error

What this code means

Coolant temperature sensor feedback voltage is too high (high error). Action level L01.

Applies to: PC200-8/PC200-8M0 excavator (engine controller).

Need the part?

If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (CA144), machine model and serial number — we quote genuine and OEM replacement parts for export.

Source: Komatsu PC200-8M0 Shop Manual (SEN06131-00) – Failure codes table. Cross-checked in two independent sources. Compiled 2026-10-30. No manufacturer affiliation.