Code U0135 on the 2022 Mazda CX-30 indicates lost communication with a suspension control component designated as module 'D'. While the CX-30 uses conventional suspension, certain models with available features may have electronic suspension-related modules.
CX-30 Suspension Electronics
The CX-30 may have ride height sensors for headlight auto-leveling or, in some markets, G-Vectoring Control Plus components that interface with chassis systems. These sensors and modules communicate over the vehicle network to coordinate with other systems.
System Effects
With U0135 present, affected features will be disabled. Headlight auto-leveling may not function, leaving beam aim fixed. G-Vectoring Control adjustments may be limited. Warning indicators appear on the dashboard, and related features show fault messages on the driver display.
Diagnostic Approach
Identify which component corresponds to 'D' in the CX-30's system using Mazda service information. Ride height sensors are typically on the suspension near the wheel. Check the component's connector for damage. Verify power, ground, and network communication at the sensor or module.
Repair Path
Address connector and wiring issues first. Many U0135 codes result from sensor mounting or connection problems rather than electronics failure. If component replacement is needed, Mazda diagnostic tools may be required for configuration or calibration.