LEMON Manuals: Even more car manuals for everyone
Home >> Kia >> 2017 >> Cadenza Technology >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (4 Of 6) >> DTC P0420-00: Catalyst System Efficiency Below Threshold (Bank 1) >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Check the canister purge valve stuck
  1. Leakage at each hose or fuel pipe
  2. Leakage at canister close valve/canister/fuel tank/fuel inlet cap
Enable Conditions
  • Engine coolant temperature above 40°C (104°F)
  • Ambient higher than -3.75°C (25.25°F)
  • Vehicle speed lower than 12km/h (7.5mph)
  • Fuel gauge below 85%
  • Above 100s after engine "ON"
  • Ambient higher than 75kPa
  • Load of canister below 0.35
  • Canister purge takes at least more than 3s when load of canister below 0.1
  • Canister purge takes at least more than 3s when load of canister above 0.1
  • Engine speed higher than 1400RPM and lower than 2500RPM
  • Accelerator pedal is less than 0.01%
  • Difference of fuel tank pressure higher than-1100Pa and lower than 400Pa
  • Above 60s after leakage check failure
  • Above 60s after engine "ON"
  • Barometric pressure gradient is less than -7.5kPa for 5minutes during hill driving
  • Battery voltage higher than 10V
  • Fuel is not sloshing
Threshold Value
  • Air outlet diameter above 0.81mm
Diagnostic Time
  • 30s
MIL ON Condition
  • 2 driving cycles