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Home >> Mazda >> 2024 >> CX-30 Preferred >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (On-Board Diagnostic - Engine Control (VIN Y) (6 Of 6)) >> DTC P2237-00: A/F Sensor System: Open Circuit In A/F Sensor Control Circuit >> Details On DTCs

Details On DTCs

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P2237:00 (PCM - VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location A/F sensor system: Open circuit in A/F sensor control circuit
Detection condition Determination conditions
  • After A/F sensor activation, the specified period of time has elapsed while the PCM A/F sensor control circuit voltage is within the specified range.
Preconditions
  • Battery voltage: 11-18 V*1
  • The following DTCs are not detected:
    • Internal PCM malfunction: P064D:00
*1 : Standard can be verified by displaying PIDs using M-MDS
Malfunction determination period
  • Not applicable
Drive cycle
  • 2
Self test type
  • CMDTC self test, KOER self test
Sensor used
  • A/F sensor
Fail-safe
  • Fixes duty value of A/F sensor heater.
  • Stops fuel feedback control of A/F sensor.
Vehicle status when DTCs are output
  • Not applicable
Possible cause
  • Malfunction in wiring harness (including connector/terminal) between A/F sensor and PCM
  • A/F sensor malfunction
  • PCM malfunction