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Home >> Infiniti >> 2012 >> FX35 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 211 (Engine Control System (VQ35HR) - FX35 - DTC U0101, U0164, U1001, & P0011 Through P0133 / P0153) >> DTC P0031, P0032, P0051, P0052: A/F Sensor 1 Heater >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2011 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION CONDITION CHART

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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