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Home >> Infiniti >> 2008 >> EX35 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS U1000 To P0153 >> P0031, P0032, P0051, P0052 A/F Sensor 1 Heater >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

DTC DETECTING CONDITION AND POSSIBLE CAUSE REFERENCE

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0031 Air fuel ratio (A/F) sensor 1 heater (bank 1) control circuit low The current amperage in the A/F sensor 1 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM through the A/F sensor 1 heater.)
  • Harness or connectors

    (The A/F sensor 1 heater circuit is open or shorted.)

  • A/F sensor 1 heater
P0032 Air fuel ratio (A/F) sensor 1 heater (bank 1) control circuit high The current amperage in the A/F sensor 1 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to ECM through the A/F sensor 1 heater.)
  • Harness or connectors

    (The A/F sensor 1 heater circuit is shorted.)

  • A/F sensor 1 heater
P0051 Air fuel ratio (A/F) sensor 1 heater (bank 2) control circuit low The current amperage in the A/F sensor 1 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM through the A/F sensor 1 heater.)
  • Harness or connectors

    (The A/F sensor 1 heater circuit is open or shorted.)

  • A/F sensor 1 heater
P0052 Air fuel ratio (A/F) sensor 1 heater (bank 2) control circuit high The current amperage in the A/F sensor 1 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to ECM through the A/F sensor 1 heater.)
  • Harness or connectors

    (The A/F sensor 1 heater circuit is shorted.)

  • A/F sensor 1 heater
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