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.

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HOMESERVICE MANUALSGENESIS2021GV80 2.5T ADVANCED, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOLLISION/AVOIDANCEADAS DRIVING ECU DIAGNOSISDTC C1642-82: CAN MESSAGE FAILURE - BRAKEDTC INFORMATION AND INSPECTIONDTC SETTING CONDITION

2021 Genesis GV80 2.5T Advanced, AWD

DTC Setting Condition

2021 Genesis GV80 2.5T Advanced, AWDSECTION DTC Setting Condition

Troubleshooting	Condition	Possible Cause
Main Action	Monitor the CAN messages	Faulty IEB (ESP) system Open/short in CAN communication circuit (poor contact) Intermittent contact failure of controller connector, power (including fuse) and chassis ground
Prerequisite Condition	Engine is on (Receive signals from EMS for more than 3 seconds of engine running) Battery Voltage is between 9V and 16V Ignition has been on for over 3 seconds CAN communication lines are normal
Threshold Value	Abnormal messages are received from the IEB (ESP) (Abnormal counter value)
Diagnostic Time	0.5 seconds
MIL	Warning lamp ON

RENDER: 1.0x

NO RELATED

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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.