Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Mazda CX-3 AWDFACTORY OEM SERVICE PROCEDURE
HS/Ms - Can DTCS
DTC DESCRIPTION
| DTC | Reference for initial letter of DTC is capital U |
|---|---|
| U0073:00 | (See DTC TABLE [SKYACTIV-G 2.0] .) |
| U0101:00 | |
| U0104:00 | |
| U0121:00 | |
| U0131:00 | |
| U0140:00 | |
| U0151:00 | |
| U0155:00 | |
| U0214:00 | |
| U0235:00 | |
| U023A:00 | |
| U0001:88 | (See DTC TABLE [DSC HU/CM] .) |
| U0100:00 | |
| U0101:00 | |
| U0104:00 | |
| U0114:00 | |
| U0131:00 | |
| U0140:00 | |
| U0151:00 | |
| U0155:00 | |
| U0235:00 | |
| U023A:00 | |
| U0073:00 | (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (EW6A-EL/EW6AX-EL)] .) |
| U0100:00 | |
| U0121:00 | |
| U0131:00 | |
| U0155:00 | |
| U0214:00 | |
| U0001:88 | (See DTC TABLE [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE] .) |
| U0100:00 | |
| U0131:00 | |
| U0140:00 | |
| U0155:00 | |
| U0001:88 | (See DTC TABLE [RADAR UNIT] .) |
| U0100:00 | |
| U0101:00 | |
| U0121:00 | |
| U0131:00 | |
| U0140:00 | |
| U0151:00 | |
| U0155:00 | |
| U0214:00 | |
| U0235:00 | |
| U023A:00 | |
| U0001:88 | (See DTC TABLE [BCM] .) |
| U0100:00 | |
| U0101:00 | |
| U0121:00 | |
| U0151:00 | |
| U0155:00 | |
| U0214:00 | |
| U023A:00 | |
| U0001:88 | (See DTC TABLE [POSITION MEMORY CONTROL MODULE] .) |
| U0100:00 | |
| U0101:00 | |
| U0151:00 | |
| U0155:00 | |
| U0214:00 | |
| U0001:88 | (See DTC TABLE [AWD CONTROL MODULE] .) |
| U0100:00 | |
| U0101:00 | |
| U0121:00 | |
| U0001:87 | (See DTC TABLE [ELECTRIC PARKING BRAKE] .) |
| U0001:88 | |
| U0100:00 | |
| U0101:00 | |
| U0121:00 | |
| U0151:00 | |
| U0155:00 | |
| U0001:00 | (See DTC TABLE [LASER SENSOR] .) |
| U0100:00 | |
| U0121:00 | |
| U0131:00 | |
| U0155:00 | |
| U0001:88 | (See DTC TABLE [FORWARD SENSING CAMERA (FSC)] .) |
| U0100:00 | |
| U0104:00 | |
| U0121:00 | |
| U0131:00 | |
| U0140:00 | |
| U0151:00 | |
| U0155:00 | |
| U0156:00 | |
| U0214:00 | |
| U0001:88 | (See DTC TABLE [EPS CONTROL MODULE] .) |
| U0100:00 | |
| U0121:00 | |
| U0155:00 | |
| U0214:00 | |
| U0001:88 | (See DTC TABLE [START STOP UNIT] .) |
| U0028:87 | |
| U0100:00 | |
| U0101:00 | |
| U0121:00 | |
| U0121:87 | |
| U0131:00 | |
| U0140:00 | |
| U0146:00 | |
| U0151:00 | |
| U0155:00 | |
| U0001:88 | (See DTC TABLE [CONNECTIVITY MASTER UNIT] .) |
| U0100:00 | |
| U0101:00 | |
| U0104:00 | |
| U0121:00 | |
| U0131:00 | |
| U0140:00 | |
| U0151:00 | |
| U0155:00 | |
| U0182:00 | |
| U0214:00 | |
| U0235:00 | |
| U023A:00 | |
| U0001:88 | (See DTC TABLE [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)]
.) (See DTC TABLE [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)] .) |
| U0100:00 | |
| U0155:00 | |
| U0001:88 | (See DTC TABLE [ACTIVE DRIVING DISPLAY] .) |
| U0100:00 | |
| U0101:00 | |
| U0104:00 | |
| U0155:00 | |
| U0156:00 | |
| U0235:00 | |
| U023A:00 | |
| U0001:88 | (See DTC TABLE [INSTRUMENT CLUSTER] .) |
| U0100:00 | |
| U0101:00 | |
| U0104:00 | |
| U0114:00 | |
| U0121:00 | |
| U0131:00 | |
| U0140:00 | |
| U0151:00 | |
| U0156:00 | |
| U0158:00 | |
| U0182:00 | |
| U0214:00 | |
| U0235:00 | |
| U023A:00 |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.