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Home >> Nissan-Datsun >> 2021 >> Armada S, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (4 Of 5) >> Engine (ECM) >> DTC P2098: A/F Sensor 1 >> DTC Description >> DTC Detection Logic
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DTC Detection Logic

To judge the malfunction, the A/F signal computed by ECM from the A/F sensor 1 signal is monitored so it will not shift to LEAN side or RICH side.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible Cause

P2098

POST CAT FUEL TRIM SYS B2

(Post catalyst fuel trim system too lean bank 2)

The output voltage computed by ECM from the A/F sensor 1 signal is shifts to the lean side for a specified period.
  • A/F sensor 1 (bank 2)
  • A/F sensor 1 heater
  • Heated oxygen sensor 2 (bank 2)
  • Fuel pressure
  • Fuel injector
  • Intake air leaks
  • Exhaust gas leaks
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