U01xx OBD-II Codes (U0100–U0199)

100 fault codes in the U01xx range. Click any code for causes, diagnostic steps, severity, and common fixes.

U0100 critical
Lost Communication With ECM/PCM A
U0101 critical
Lost Communication With TCM
U0102 moderate
Lost Communication With Transfer Case Control Module
U0103 moderate
Lost Communication With Gear Shift Module
U0104 low
Lost Communication With Cruise Control Module
U0105 critical
Lost Communication With Fuel Injector Control Module
U0106 moderate
Lost Communication With Glow Plug Control Module
U0107 critical
Lost Communication With Throttle Actuator Control Module
U0108 moderate
Lost Communication With Alternative Fuel Control Module
U0109 critical
Lost Communication With Fuel Pump Control Module
U0110 critical
Lost Communication With Drive Motor Control Module
U0111 critical
Lost Communication With Battery Energy Control Module
U0112 critical
Lost Communication With Battery Energy Control Module B
U0113 moderate
Lost Communication With Emissions Critical Control Information
U0114 moderate
Lost Communication With Four-Wheel Drive Clutch Control Module
U0115 critical
Lost Communication With ECM/PCM B
U0116 critical
Lost Communication With Vehicle Immobilizer Control Module
U0117 critical
Lost Communication With Passive Restraint Control Module
U0118 critical
Lost Communication With Power Steering Control Module
U0119 low
Lost Communication With Heated Steering Wheel Module
U0120 critical
Lost Communication With Starter/Generator Control Module
U0121 moderate
Lost Communication With Anti-Lock Brake System Module
U0122 moderate
Lost Communication With Vehicle Dynamics Control Module
U0123 moderate
Lost Communication With Yaw Rate Sensor Module
U0124 moderate
Lost Communication With Lateral Acceleration Sensor Module
U0125 moderate
Lost Communication With Multi-axis Acceleration Sensor Module
U0126 moderate
Lost Communication With Steering Angle Sensor Module
U0127 moderate
Lost Communication With Trailer Brake Control Module
U0128 critical
Lost Communication With Park Brake Control Module
U0129 critical
Lost Communication With Brake System Control Module
U0130 moderate
Lost Communication With Steering Effort Control Module
U0131 moderate
Lost Communication With Power Steering Control Module
U0132 moderate
Lost Communication With Ride Level Control Module
U0133 moderate
Lost Communication With Suspension Damper Control Module
U0134 moderate
Lost Communication With Roll Stability Control Module
U0135 moderate
Lost Communication With Differential Control Module -- Front
U0136 moderate
Lost Communication With Differential Control Module -- Rear
U0137 moderate
Lost Communication With Active Roll Control Module
U0138 moderate
Lost Communication With All-Terrain Control Module
U0139 low
Lost Communication With Ride Quality Control Module
U0140 moderate
Lost Communication With Body Control Module
U0141 moderate
Lost Communication With Body Control Module A
U0142 moderate
Lost Communication With Body Control Module B
U0143 low
Lost Communication With Body Control Module C
U0144 critical
Lost Communication With Traction Motor Control Module
U0145 critical
Lost Communication With Traction Motor Control Module B
U0146 critical
Lost Communication With Gateway A
U0147 critical
Lost Communication With Gateway B
U0148 low
Lost Communication With Accessory Protocol Interface Module
U0149 low
Lost Communication With Seat Control Module A
U0150 low
Lost Communication With Seat Control Module B
U0151 critical
Lost Communication With Restraints Control Module (Airbag)
U0152 moderate
Lost Communication With Side Obstacle Detection Control Module -- Left
U0153 moderate
Lost Communication With Side Obstacle Detection Control Module -- Right
U0154 moderate
Lost Communication With Obstacle Detection Control Module -- Rear
U0155 moderate
Lost Communication With Instrument Panel Cluster
U0156 low
Lost Communication With Information Center A
U0157 low
Lost Communication With Information Center B
U0158 low
Lost Communication With Head-Up Display Module
U0159 critical
Lost Communication With Park Brake Control Module
U0160 low
Lost Communication With Parking Assist Control Module
U0161 low
Lost Communication With Compass Module
U0162 low
Lost Communication With Navigation Control Module
U0163 low
Lost Communication With Navigation Map Database Module
U0164 low
Lost Communication With HVAC Control Module
U0165 critical
Lost Communication With Vehicle Dynamics Control Module
U0166 critical
Lost Communication With Vehicle Dynamics Control Module B
U0167 critical
Lost Communication With Immobilizer Control Module
U0168 critical
Lost Communication With Vehicle Immobilizer Control Module
U0169 low
Lost Communication With Sunroof Control Module
U0170 critical
Lost Communication With Restraints Occupant Classification Module
U0171 low
Lost Communication With Restraints Dimming Sensor Module
U0172 moderate
Lost Communication With Chassis Control Module
U0173 critical
Lost Communication With Fuel Pump Control Module
U0174 moderate
Lost Communication With Turbocharger Boost Control Module
U0175 moderate
Lost Communication With Generator Control Module
U0176 low
Lost Communication With Heated Steering Wheel Module
U0177 moderate
Lost Communication With Exhaust Gas Sensor Heater Control Module
U0178 low
Lost Communication With Seat Memory Module A
U0179 moderate
Lost Communication With Steering Effort Control Module
U0180 low
Lost Communication With Automatic Headlamp Leveling Module
U0181 moderate
Lost Communication With Blind Spot Detection Module
U0182 moderate
Lost Communication With Lane Departure Warning Module
U0183 low
Lost Communication With Door Control Module A
U0184 low
Lost Communication With Audio/Entertainment Control Module A
U0185 low
Lost Communication With Auxiliary Audio Input Module
U0186 low
Lost Communication With Audio Amplifier Module A
U0187 low
Lost Communication With Satellite Radio Receiver Module
U0188 low
Lost Communication With Hands-Free Telephone Module
U0189 low
Lost Communication With Rear Entertainment Control Module
U0190 low
Lost Communication With HVAC Data Display Module
U0191 low
Lost Communication With Television Control Module
U0192 low
Lost Communication With Personal Computer Interface Module
U0193 critical
Lost Communication With Fuel Cell Control Module
U0194 critical
Lost Communication With Ignition Switch Module
U0195 moderate
Lost Communication With Front Distance Range Sensor
U0196 low
Lost Communication With Rear Distance Range Sensor
U0197 moderate
Lost Communication With Trailer Brake Control Module
U0198 low
Lost Communication With Telematic Control Module
U0199 low
Lost Communication With Door Control Module B
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