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Home >> Mazda >> 2022 >> CX-5 S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (On-Board Diagnostic - Engine Control System (VIN Y) (2 Of 7)) >> DTC P0131-00: A/F Sensor Circuit Low Input >> Details On DTCs

Details On DTCs

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DTC P0131-00: (PCM, VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE

DESCRIPTION A/F sensor circuit low input
DETECTION CONDITION Determination conditions
  • Any one of the following conditions is met:
  • Voltage of A/F sensor terminal F is less than specified value
  • Voltage of A/F sensor terminal D is less than specified value
    • Voltage of A/F sensor terminal B is less than specified value
Preconditions
  • Switch the ignition ON (engine off or on)
  • Battery voltage: 11-18 V(1)
  • The following DTC is not detected:
    • Internal PCM malfunction: P064D-00:
Drive cycle
Self test type
  • CMDTC self test, KOER self test
Sensor used
  • A/F sensor
FAIL-SAFE FUNCTION
  • Fixes duty value of A/F sensor heater
  • Stops fuel feedback control of A/F sensor
VEHICLE STATUS WHEN DTCs ARE OUTPUT
  • Illuminates check engine light.
POSSIBLE CAUSE
  • A/F sensor connector or terminals malfunction
  • PCM connector or terminals malfunction
  • Short to ground in wiring harness between the following terminals:
  • A/F sensor terminal F-PCM terminal 1G
  • A/F sensor terminal D-PCM terminal 1C
    • A/F sensor terminal B-PCM terminal 1L
  • A/F sensor malfunction
  • PCM malfunction
(1) Standard can be verified by displaying PIDs using M-MDS