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.
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HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 552 (ON-BOARD DIAGNOSTIC [MULTIPLEXCOMMUNICATION SYSTEM])
2010 Mazda 5 Sport, 2.3 L, Standard
Section 552 (On-Board Diagnostic [MULTIPLEXCOMMUNICATION System])
2010 Mazda 5 Sport, 2.3 L, StandardSECTION Section 552 (On-Board Diagnostic [MULTIPLEXCOMMUNICATION System])
WARNING: This page is about a different car, the 2008 Mazda 5. However, it is still accessible from the selected car via links, so may be relevant.
- DTC Table [Multiplex Communication System]
- Multiplex Communication System [Multiplex Communication System]
- Procedures For Determining The Location Of A Malfunction [Multiplex Communication System]
- DTC U0073, U2012 [Multiplex Communication System]
- DTC U0073, U0516, U2516, 16:Er12, 26:Er81, CAN Bus [MULTIPLEX COMMUNICATION SYSTEM]
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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.