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2020 Santa Fe Limited Blind Spot Monitor Malfunction

0

Mike T. · rep 0 · May 25, 2:02 AM · 1 replies · solved · Question

Vehicle: 2020 Hyundai Santa Fe Limited

My 2020 Hyundai Santa Fe Limited has developed an intermittent issue with its Blind Spot Monitoring (BSM) system. I keep getting a 'Blind Spot Monitor Malfunction' warning message on the instrument cluster.

Sometimes it works perfectly fine for a few days, then suddenly the warning pops up and the system becomes inactive. I haven't been in any accidents, and there's no visible damage to the rear bumper where the sensors are located.

Could this be a faulty sensor, a wiring issue, or perhaps a software glitch? Has anyone else experienced this with their Santa Fe or a similar Hyundai model?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:02 AM

0

ClearTheCode admin answer:

An intermittent Blind Spot Monitor (BSM) malfunction on your 2020 Santa Fe Limited can be frustrating but is a known issue in some modern vehicles. Here's what to consider:

  1. Check for Obstructions: Even if there's no visible damage, ensure the rear bumper corners (where the radar sensors are located) are completely clean and free of dirt, ice, or stickers. Sometimes, even a thick layer of mud can interfere.
  2. Scan for Diagnostic Trouble Codes (DTCs): A professional-grade OBD-II scanner (or one capable of reading body control module codes) will be crucial here. Look for B-codes (Body) related to the BSM system. Common codes include:
    • B1650: BSM System Malfunction
    • B1651/B1652: Left/Right BSM Radar Sensor Malfunction
    • Codes indicating communication errors with the BSM control module.
  3. Wiring and Connector Inspection: The radar sensors in the rear bumper have wiring harnesses. Over time, these can become loose, corroded, or damaged due to road debris or moisture. A technician would inspect these connections.
  4. Sensor Calibration: After a repair or sometimes even without one, BSM sensors may require recalibration. This is a specialized procedure that ensures the sensors are accurately reading the surrounding environment.
  5. Module Failure: Less common, but the BSM control module itself could be faulty, especially if multiple sensors are reporting issues or communication errors persist.
  6. When to See a Shop:
    • If cleaning the sensors doesn't resolve the issue.
    • If you get persistent DTCs that point to a specific sensor or module.
    • If the system is completely unresponsive or gives constant false warnings.
    • BSM systems are safety-critical, so professional diagnosis is recommended to ensure proper function.
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