Komatsu · CA451
Common Rail Pressure Sensor Feedback High
What this code means
Common rail pressure sensor feedback value is too high (too large).
Applies to: PC200-8 excavator (engine controller).
Need the part?
If diagnosis points to a failed sensor, solenoid, controller or harness part, send us the code (CA451), machine model and serial number — we quote genuine and OEM replacement parts for export.
Ask for the replacement part on WhatsAppSource: ProCarManuals – Komatsu Fault/Error Codes list (manual library). Single published source — confirm against the manual for your exact model before ordering parts. Compiled 2026-10-30. No manufacturer affiliation.