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Home >> Mazda >> 2021 >> 6 Signature >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Front Body Control Module (FBCM) >> DTC U0401-68: Error Signal Received From Pcm (FBCM) >> Notes

DTC U0401-68: Error Signal Received From Pcm (FBCM): Notes

DTC U0401:68 (FBCM) DETECTION CONDITION AND POSSIBLE CAUSE

Description Error signal received from PCM
Detection condition
  • Front body control module (FBCM) receives the error ECT sensor or ambient temperature sensor signals from the PCM for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe Not applicable
Possible cause
  • ECT sensor malfunction
  • Ambient temperature sensor malfunction
  • PCM malfunction
  • Front body control module (FBCM) malfunction
System wiring diagram Not applicable