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DTC Detection Logic

DTC DETECTION CONDITION CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0078 Exhaust valve timing control magnet retarder (bank 1) circuit An improper voltage is sent to the ECM through exhaust valve timing control magnet retarder.
  • Harness or connectors (Exhaust valve timing control magnet retarder circuit is open or shorted.)
  • Exhaust valve timing control magnet retarder
P0084 Exhaust valve timing control magnet retarder (bank 2) circuit