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 replaces the ABS module fuse with a lower-amperage fuse that limits the module's operating current.
Common Symptoms
- Burning or melting-plastic smell from the engine bay
- Smoke from under the hood while parked or driving
- Check-engine (MIL) and/or battery warning light illuminated
How to Fix
Confirm the VIN against Recall 21V-161 (007G) and have the free remedy performed — dealers replace the ABS module fuse with a lower-amperage fuse that limits the module's operating current. 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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.