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DTC P0131:00: Notes

DTC P0131:00 (MZR 1.5) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0131:00 A/F sensor circuit low input
DETECTION CONDITION 
  • If the voltage for control of the A/F sensor in the PCM is 1.13 V (+ terminal) or lower, or 0.64 V (-terminal) or lower. 

    Diagnostic support note 

  • This is an intermittent monitor (A/F sensor, HO2S).
  • The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
  • PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
  • FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • A/F sensor connector or terminals malfunction
  • Short to ground in wiring harness between the following terminals:
    • A/F sensor terminal A-PCM terminal 2Z
    • A/F sensor terminal B-PCM terminal 2AD
  • PCM connector or terminals malfunction
  • A/F sensor malfunction
  • PCM malfunction
G06940369
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