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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 2405 (Engine Control System - DTCS U0101 To P0175 (VK56DE)) >> DTC P0031, P0032, P0051, P0052: A/F Sensor 1 Heater >> On Board Diagnosis Logic

On Board Diagnosis Logic

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0031 0031 (Bank 1) Air fuel ratio (A/F) sensor 1 heater control circuit low The current amperage in the air fuel ratio (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
P0051 0051 (Bank 2)
P0032 0032 (Bank 1) Air fuel ratio (A/F) sensor 1 heater control circuit high The current amperage in the air fuel ratio (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
P0052 0052 (Bank 2)