Network DTC Codes "U" Codes
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U0102 — Lost Communication with Transfer Case Control Module (TCCM)
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U0121 — Lost Communication with ABS/Electronic Brake Control Module (EBCM)
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U0122 — Lost Communication with Vehicle Dynamics Control (VDC/VSA/ESC) Module
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U0123 — Lost Communication with Yaw Rate Sensor (YRS) Module
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U0124 — Lost Communication with Lateral Acceleration (G) Sensor Module
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U0126 — Lost Communication with Steering Angle Sensor (SAS) Module
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U0128 — Lost Communication with Park Brake Control Module (EPB/PBCM)
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U0131 — Lost Communication with Power Steering Control Module (PSCM)
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U0151 — Lost Communication with Restraints Control Module (RCM/SDM/ORC)
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U0155 — Lost Communication with Instrument Panel Cluster (IPC)
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U0159 — Lost Communication with Parking Assist Control Module “A” (PAM)
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U0162 — Lost Communication with Navigation/Display Unit (Head Unit/AVN)
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U0164 — Lost Communication with HVAC (Climate/EATC) Control Module
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U0180 — Lost Communication with Automatic Lighting Control Module (ALCM)
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U0184 — Lost Communication with Radio / Audio Control Module (ACM)
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U0197 — Lost Communication with Telephone/Telematics (Hands-Free/Phone) Control Module
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U1000 — Generic “Network Communication Error” (legacy Class-2 / OEM-specific CAN context)