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Home >> Infiniti >> 2013 >> EX37 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (Engine Control System - DTCS P1217 To P2A03) >> P2A00, P2A03 A/F Sensor 1 >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2008 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.

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 CAUSE REFERENCE

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2A00 Air fuel ratio (A/F) sensor 1 (bank 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.
  • A/F sensor 1
  • A/F sensor 1 heater
  • Fuel pressure
  • Fuel injector
  • Intake air leaks
P2A03 Air fuel ratio (A/F) sensor 1 (bank 2) circuit range/performance
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