2021 Mazda CX-3 AWDFACTORY OEM SERVICE PROCEDURE

Laser Sensor DTCS

DTC DESCRIPTION

DTC Refer to
U0001: 00 (See DTC U0001:00/U0100:00/U0121:00/U0131:00/U0155:00 .)
U0100: 00
U0121: 00
U0131: 00
U0155: 00
U0401: 00 (See DTC U0401:00/U0401:82 .)
U0401: 82
U0415: 00 (See DTC U0415:00/U0415:68/U0415:82 .)
U0415: 68
U0415: 82
U0420: 00 (See DTC U0420:00/U0420:82 .)
U0420: 82
U0423: 00 (See DTC U0423:00/U0423:82 .)
U0423: 82  
U1A14: 49 (See DTC U1A14:49 .)
U2300: 54 (See DTC U2300:54/U2300:55/U2300:56/U2300:64 .)
U2300: 55
U2300: 56
U2300: 64
U3000: 00 (See DTC U3000:00/U3000:64 .)
U3000: 64
U3000: 66 (See DTC U3000:66 .)
U3003: 16 (See DTC U3003:16/U3003:17 .)
U3003: 17
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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