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Home >> Chevrolet >> 1998 >> Tracker 4D Utility, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P0420: Three-Way Catalyst (TWC) System Low Efficiency >> Condition For Setting DTC

Condition For Setting DTC

Engine coolant temperature 158-230°F (70-110°C), intake air temperature 14-158°F (-10-70°C), barometric pressure greater than 75 kPa, fuel tank level greater than 15 percent, engine speed 2750-3500 RPM, closed loop mode 139 seconds at 3000 RPM and all condition present for 96 seconds.