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.
2006 Mazda MX-5 Miata BaseFACTORY OEM SERVICE PROCEDURE
Multiplex Communication DTCS
MULTIPLEX COMMUNICATION DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Malfunction location | Reference |
|---|---|---|
| U0073 | CAN system communication error | (See DTC U0073, U2516 .) |
| U0100 | Communication error to PCM | (See PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION .) |
| U0101 | Communication error to TCM | |
| U0121 | Communication error to ABS HU/CM or DSC HU/CM | |
| U0155 | Communication error to instrument cluster | |
| U0214 | Communication error to keyless control module | |
| U0323 | Communication error to instrument cluster | |
| U1900 | Communication error to other module | |
| U2023 | Abnormal message from PCM | |
| U2516 | CAN system communication error | (See DTC U0073, U2516 .) |
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.