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Home >> Suzuki >> 2002 >> Esteem GL, 4D Wagon, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 1.6L >> Diagnostic Tests >> DTC P0420: Catalyst System Efficiency Below Threshold >> Test Result Confirmation Flow
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Test Result Confirmation Flow

  1. Using scan tool, check for current or pending DTCs. If any DTC is set or pending, perform appropriate testing procedure. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  . If no DTCs are set, go to next step.
  2. On scan tool, select READINESS TESTS mode. Check that testing has been completed. If READINESS TEST is complete and no DTC is stored, confirmation is complete. Go to, DIAGNOSIS & REPAIR PROCEDURE  . If READINESS TEST is not completed, repeat DTC CONFIRMATION TEST  .
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