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Home >> Nissan-Datsun >> 2008 >> Sentra SL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Control System - DTCS P1148 To P2A03 (Qr25DE)) >> DTC P2A00, P2A03 A/F Sensor 1 >> On Board Diagnosis Logic

On Board Diagnosis Logic

WARNING: This page is about a different variant/trim than selected.

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

DTC DETECTING CONDITION AND POSSIBLE CAUSES CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P2A00
2A00
(Bank 1)		 Air fuel ratio (A/F) sensor 1 circuit range/performance
  • The output voltage computed by ECM from the A/F sensor 1 signal is shifted to the lean side for a specified period.
  • The A/F signal computed by ECM from the A/F sensor 1 signal is shifted to the rich side for a specified period.
  • Air fuel ratio (A/F) sensor 1
  • Air fuel ratio (A/F) sensor 1 heater
  • Fuel pressure
  • Fuel injector
  • Intake air leaks
P2A03
2A03
(Bank 2)
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