C1611: How to Diagnose & Fix — ABS Control Module Internal Fault
2 vehicles · 2 makes
How to diagnose and fix C1611: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Genesis G70 · 2019–2021
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)
Kia K5 · 2021–2025
The Advanced Driver Assistance Systems on the K5 — including Lane Keep Assist, Forward Collision Avoidance, and Blind Spot Monitoring — intermittently throw calibration faults and disable themselves.
Common Symptoms
- Lane Keep Assist warning light and system disabled
- Forward Collision warning malfunction message
- Blind Spot Monitor not functioning
- Multiple ADAS warning lights on dashboard
How to Fix
For intermittent faults in normal conditions: clean the windshield interior and exterior thoroughly around the camera area. Ensure the camera lens cover behind the rearview mirror is clean and unobstructed. After windshield replacement, ALWAYS have the ADAS camera recalibrated at a Kia dealer — this requires specialized targets and equipment.
Owner tips & cautions
- WarningIf you get your windshield replaced, INSIST on ADAS recalibration. The camera must be recalibrated to the new windshield or your safety systems will not function correctly. Budget $300-$500 for this.
Sources for this issue (4)
- Kia TSB ELE 216 / Service Action SA442: Multifunction Camera (MFC) Replacement, 2021MY K5 (DL3a)tsb
- Kia PITSTOP PS704: Front Radar Sensor Mounting Inspection (NHTSA TSB 10200525), listed for 2022 K5tsb
- 2021 Kia K5 Forward Collision Avoidance Warnings complaints (NHTSA complaint mirror)owner-reports
- 2023 Kia K5 Forward Collision Avoidance Warnings complaints (NHTSA complaint mirror)owner-reports
Find C1611 by make
Browse every documented model and issue for your make.
C1611 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 C1611 mean?
C1611 stands for "ABS Control Module Internal Fault." C1611 is a brake-system code indicating an internal fault within the ABS control module itself — the unit ran its self-checks and found that one of its internal electronics or processors isn't working correctly. Because the fault is inside the module's own hardware/firmware, it's usually not something you can fix by replacing an external sensor. The module typically disables ABS, traction control, and stability control when this is stored, while normal hydraulic braking remains. It generally points to a failing or failed ABS/EBCM unit, though power, ground, and software issues should be ruled out first.
What are the most common causes of C1611?
The most common causes of C1611 are: Failed ABS/EBCM control module (internal electronics), Low or unstable supply voltage to the module, Poor power or ground connections at the module, Corrosion or moisture intrusion in the module connector, Outdated or corrupted module software requiring reflash, Internal solenoid or pump driver failure within the unit. The specific cause varies by vehicle.
How much does it cost to fix C1611?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by C1611?
Au7o has documented C1611 across 2 vehicle models from 2 manufacturers: Genesis, Kia.
Join 700+ subscribers following Au7o for vehicle insights and updates.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.