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Home >> Acura >> 2019 >> RDX Technology, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC Diagnostics (P0300 - P1658) >> DTC Troubleshooting >> DTC P0420 >> Notes

DTC P0420: Notes

DTC P0420  : Catalyst System Efficiency Below Threshold

How To Use This Service Information .

NOTE:
  • Before you troubleshoot, review the How to Troubleshoot .
  • Poor quality fuel may cause this DTC.
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