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2020 MAZDA MAZDA3
2.5L Skyactiv-G I4 (186 hp)•AWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor987Torque6478Fluid16DTC2264Battery2Maintenance0Recalls2
B0064high severityBody

Child Seat Detection Circuit

on 2020 Mazda Mazda3 2.5L Skyactiv-G I4 (186 hp) · AWD

What this code means

Malfunction in the child seat detection system. This system uses the occupancy sensor or a dedicated transponder to detect a child restraint system.

Symptoms

  • Child seat indicator malfunction
  • Airbag light on
  • Airbag may deploy when child seat is installed
  • Child restraint not detected

Common causes

  • Faulty child seat detection transponder
  • OCS sensor mat failure
  • Wiring issue
  • Non-compatible child seat

Diagnostic steps

  1. Scan SRS codes
  2. Test child seat detection with compatible seat
  3. Check OCS sensor readings
  4. Inspect under-seat wiring

Repair notes

Replace OCS mat or child seat detection transponder. Ensure child seat compatibility.

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