LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 361 (Engine Control System (DTC/Circuit Diagnosis) (9 Of 17)) >> DTC/Circuit Diagnosis >> DTC P0420: Three Way Catalyst Function >> DTC Description >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

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

--