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Home >> Suzuki >> 2007 >> Aerio Base, FWD, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0420: Catalyst System Efficiency below Threshold >> DTC Confirmation Procedure

DTC Confirmation Procedure

WARNING:
  • When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
  • Road test should be carried out with 2 persons, a driver and a tester, on a level road.
NOTE: Check to make sure that the following conditions are satisfied when using this "DTC Confirmation Procedure".
  • Intake air temp.: Between -10°C and 70°C (14°F and 158°F)
  1. Connect scan tool to DLC with ignition switch turned OFF.
  2. Turn ON ignition switch and clear DTC using scan tool.
  3. Increase vehicle speed to 50 - 60 mph, 80 - 100 km/h. (engine speed: 2500 - 3000 r/min.)
  4. Keep the vehicle speed for 10 min. or more (Throttle valve opening is kept constant in this step).
  5. Stop vehicle and check if DTC / pending DTC exists using scan tool. If not, check if catalyst monitoring test has completed using scan tool. If not in both of the checks (i.e., no DTC / pending DTC and catalyst monitoring test not completed), check vehicle condition (environmental) and repeat step  3 through 5.
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