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.
2021 Genesis G80 2.5T Advanced, AWDFACTORY OEM SERVICE PROCEDURE
4WD Control System Diagnosis
- Component (Location) And Function
- High Speed CAN Communication
- Low Speed CAN Communication
- DTC P1725-46: EEPROM Checksum Fault
- DTC P1736-00: Motor Supply Voltage - High voltage
- DTC P1737-00: Motor Supply Voltage - Low Voltage
- DTC P1756-4B: EMC Internal Error
- DTC P1756-98: EMC Internal Error
- DTC P1780-A3: Battery Voltage High
- DTC P1781-A2: Battery Voltage Low
- DTC P1940-00: Control module - Internal H/W Error
- DTC P1940-98: Control Module - Motor Over Temperature
- DTC P1944-92: Control Module - Internal S/W Error
- DTC P1944-9A: Control Module - Internal Voltage Error
- DTC P3101-00: Control Module - Motor Overcurrent
- DTC P3102-00: Control Module - Control ASIC Overtemperature
- DTC P3108-00: Control Unit Supply Voltage Open Circuit
- DTC P3109-00: System Failure - Torque Tube Violation
- DTC P310A-00: System Failure - Initial Position Search Failed
- DTC P310B-00: System Failure - Initial Position Drift
- DTC P310C-00: System Failure - Calibration
- DTC P310D-00: System Failure - Position During Calibration
- DTC P310E-00: Mechanical Failure - Angle Limit Exceed
- DTC P310F-00: System Failure - Maximal Clutch Stress
- DTC P3110-00: System Failure - Maximal ECU Stress
- DTC P3111-00: Mechanical Failure - Clutch Worn
- DTC P3111-64: Mechanical Failure - Clutch Worn
- DTC P3111-68: Mechanical Failure - Clutch Worn
- DTC P3111-71: Mechanical Failure - Clutch Worn
- DTC P3113-00: Failure - Initial Calibration Not Done
- DTC P3114-00: Vehicle Information Option Not Detected Or Invalid
- DTC P3115-00: Classification Missing Occurrence Only In Case Of ITA Exchanged
- DTC P3116-00: Insufficient CAN Signals - Driving Stability
- DTC P3117-00: Insufficient CAN Signals - TC Protection
- DTC P3119-00: Front/Rear Tire Difference Too Big Or All Wheel Information Missing
- DTC U0001-00: High Speed CAN Communication Bus off
- DTC U0100-00: Lost Communication With ECM/PCM 'A'
- DTC U0101-00: Lost Communication With TCM
- DTC U0121-00: Lost Communication With Anti-Lock Brake System (ABS) Control Module
- DTC U0122-00: Lost Communication With Vehicle Dynamics Control Module
- DTC U0123-00: Lost Communication With Yaw Rate Sensor Module
- DTC U0126-00: Lost Communication With Steering Angle Sensor Module
- DTC U012A-87: Lost Communication With ICSC Module
- DTC U0146-00: Lost Communication With GateWay 'A'
- DTC U0148-87: Lost Communication With DATC Module
Factory Service Tools
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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.