C1604 on Genesis: How to Diagnose & Fix
Manufacturer-Specific Chassis Code (Hyundai/Kia: ECU Hardware Error; Nissan: EPS Torque Sensor)
1 Genesis model · 1 documented issue · 1 critical
C1604 on Genesis by model: symptoms, diagnosis and fix
An electrical short circuit can develop inside the Anti-lock Brake System (ABS) hydraulic control module. Because the module is always powered, the short can cause an engine-compartment fire whether the vehicle is parked or being driven, even with the ignition off. Genesis recalled certain 2019-2021 G70 vehicles under NHTSA campaign 21V-161 (Genesis recall 007G); owners were told to park the car outside and away from structures until repaired. This is part of the broader Hyundai/Genesis ABS-fire recall family. The remedy installs a fuse in the ABS module wiring to prevent the short from igniting a fire.
Common Symptoms
- Burning or melting-plastic smell from the engine bay
- ABS / brake / traction-control warning lights illuminated
- Smoke from under the hood while parked or driving
- Blown fuses related to the ABS circuit
How to Fix
Confirm the VIN against Recall 21V-161 (007G) and have the free remedy performed — dealers add a multi-fuse to the ABS module's power supply so a short can't start a fire. Until repaired, park outdoors away from buildings. If the ABS warning light is on or the module has already been damaged, the hydraulic electronic control unit (HECU/ABS module) is inspected and replaced as needed.
Sources for this issue (1)
C1604 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does C1604 mean on a Genesis?
C1604 stands for "Manufacturer-Specific Chassis Code (Hyundai/Kia: ECU Hardware Error; Nissan: EPS Torque Sensor)." C1604 is a manufacturer-specific chassis code whose meaning depends on the maker. On Hyundai/Kia it generally indicates an internal ECU/control-module hardware error detected during the module's self-diagnostics (processor, memory, or internal power fault). On Nissan/Infiniti it has been associated with an electric power steering torque sensor fault. Because it disables a safety system (ABS/ESC or electric power steering) as a fail-safe, the affected feature may not work until repaired, so confirm the exact definition for the specific vehicle. On Genesis it is documented across 1 model: G70.
What are the most common causes of C1604?
The most common causes of C1604 are: Internal control module (EBCM/ESC or EPS) hardware fault, Electric power steering torque sensor fault (Nissan/Infiniti), Low or unstable supply voltage to the module, Corroded or loose module connector, Wiring or ground fault, Software/calibration issue requiring update. The specific cause varies by vehicle.
How much does it cost to fix C1604 on a Genesis?
Repair costs vary widely with the root cause and Genesis model; each issue on this page carries its own estimate where one is published.
Looking for C1604 on a different make?
View C1604 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.