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2020 G90 Blind Spot Monitor & Forward Collision Warning Malfunction

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Mike T. · rep 0 · May 25, 4:37 AM · 1 replies · solved · Question

Vehicle: 2020 Genesis G90 5.0L

Hello fellow Genesis owners,

I'm experiencing a concerning issue with my 2020 Genesis G90 5.0L. Recently, I've been getting intermittent warnings for the blind spot monitoring system and the forward collision-avoidance assist. Sometimes it says 'Blind Spot Monitor Malfunction' and other times 'Forward Collision Warning System Disabled' on the dashboard.

It seems to happen randomly, sometimes after starting the car, sometimes while driving. The sensors and cameras on the exterior appear clean, and there's no visible damage. I'm worried about the safety implications, as these are crucial driver-assistance features.

Has anyone encountered these specific ADAS (Advanced Driver-Assistance Systems) warnings on their G90 or other Genesis models? What was the fix? Could it be a sensor issue, a wiring problem, or something else entirely?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:37 AM

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ClearTheCode admin answer:

Malfunctions in Advanced Driver-Assistance Systems (ADAS) like Blind Spot Monitoring (BSM) and Forward Collision-Avoidance Assist (FCA) can be concerning due to their direct impact on safety. These systems rely on an array of sophisticated sensors, cameras, and radar units, all interconnected and managed by dedicated control modules.

Common Causes for ADAS Malfunctions:

  1. Sensor Obstruction/Damage: Even if not visibly damaged, dirt, ice, snow, or even a minor bump can misalign or block a radar sensor (often located behind bumpers) or camera (windshield).
  2. Wiring Issues: Loose connections, damaged wiring harnesses, or corrosion at sensor connectors can interrupt communication or power.
  3. Module Failure: The BSM or FCA control modules themselves can fail internally.
  4. Calibration Issues: After a minor collision, windshield replacement, or even suspension work, ADAS sensors may require recalibration to ensure accurate readings.
  5. Software Glitches: Firmware bugs within the ADAS control units can lead to erroneous warnings or system shutdowns.
  6. Low Battery Voltage: While less common for intermittent issues, very low battery voltage can sometimes cause various electronic systems to malfunction or disable.

When to See a Shop:

Due to the complexity and safety-critical nature of ADAS, it is highly recommended to have your Genesis G90 inspected by a Genesis dealership. They possess specialized diagnostic equipment to:

  • Read specific ADAS diagnostic trouble codes (DTCs).
  • Perform sensor calibrations.
  • Test individual sensors and control modules.
  • Check for and apply any relevant software updates.

OBD Codes (Examples):

ADAS malfunctions will typically generate specific diagnostic trouble codes (DTCs) that can be retrieved with an advanced scan tool. These codes often start with 'C' (Chassis) or 'U' (Network Communication) and point directly to the affected sensor or module. Examples might include:

  • C1611: Front Radar Sensor Malfunction
  • C1612: Rear Right Radar Sensor Malfunction (for BSM)
  • C1613: Rear Left Radar Sensor Malfunction (for BSM)
  • U0100: Lost Communication With Engine Control Module/Powertrain Control Module (can affect FCA)
  • U0420: Invalid Data Received From Power Steering Control Module (can affect lane keeping systems related to FCA)

Ignoring these warnings is not advisable, as it compromises your vehicle's safety features.

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