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.
DTC U0423 Invalid Data Received from Instrument Panel Cluster Control Module: Action
CARRY OUT a self-test of the IPC. If the diagnostic scan tool indicates the module is not responding, REFER to MODULE COMMUNICATIONS NETWORK to diagnose the network communication concern. If IPC DTCs are present, REFER to INFORMATION CENTER - INSTRUMENTATION, MESSAGE CENTER AND WARNING CHIMES to diagnose the IPC system fault. If there are no DTCs in the IPC, SET the ignition to OFF. DISCONNECT and INSPECT all IPC electrical connectors and related in-line connectors for corrosion, bent pins, pushed-out pins and spread terminals. REPAIR as necessary.
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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.