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Home >> Infiniti >> 2018 >> QX60 AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (4 Of 6) >> DTC/Circuit Diagnosis >> DTC P0420: Three Way Catalyst Function >> DTC Description >> DTC Detection Logic
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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

--

P0430

TW CATALYST SYS-B2

(Catalyst system efficiency below threshold bank 2)

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

--