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Home >> Suzuki >> 2011 >> Grand Vitara Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis >> Diagnostic Information and Procedures >> DTC P0420: Catalyst System Efficiency Below Threshold >> DTC Confirmation Procedure
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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:
  • If DTC other than aimed DTC are previously detected in DTC confirmation procedure, be sure to troubleshoot DTC previously detected.
  • Check to make sure that the following condition is satisfied when using this procedure. - ECT > 70 °C (158 °F)
  1. Start engine and warm up to normal operating temperature.
  2. Drive vehicle at 80 - 100 km/h (50 - 62 mile/h) for 10 min. (Keep throttle valve opening constantly and engine speed at 2, 500 - 3, 000 RPM in this step.)