LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2020 >> CX-30 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic - Engine Control System (4 Of 4) >> DTC U0302-00: TCM Processor Error >> Outline
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC U0302-00: TCM Processor Error: Outline

DTC U0302:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location TCM processor error
Detection condition
  • When any of the following conditions is met:
    • CAN communication line malfunction between TCM and PCM
    • TCM internal malfunction
Fail-safe
  • Not applicable
Possible cause
  • TCM connector or terminals malfunction
  • PCM connector or terminals malfunction
  • CAN communication line malfunction between PCM and TCM (Local CAN between PCM and TCM)
  • TCM detects DTCs.
  • CAN drive error (TCM or PCM)
  • TCM malfunction
  • PCM malfunction
G13556265Courtesy of MAZDA MOTORS CORP.