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Home >> Nissan-Datsun >> 2017 >> Qashqai SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 3) >> DTC/Circuit Diagnosis >> DTC P0420: Three Way Catalyst Function >> DTC Description >> DTC Detection Logic

DTC Detection Logic

DTC CONSULT screen terms
(Trouble diagnosis content)		 DTC detection condition
P0420 TW CATALYST SYS-B1
(Catalyst system efficiency below threshold bank 1)		 Diagnosis condition -
Signal (terminal) -
Threshold
  • Three way catalyst (manifold) does not operate properly
  • Three way catalyst (manifold) does not have enough oxygen storage capacity
Diagnosis delay time -
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