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Intermittent ABS/Traction Control Lights on 2017 Regal TourX

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Melissa G. · rep 0 · May 22, 3:49 AM · 1 replies · solved · Question

Vehicle: 2017 Buick Regal TourX Preferred

I'm having an intermittent issue with my 2017 Buick Regal TourX Preferred. The ABS and Traction Control warning lights will randomly come on while driving. Sometimes they stay on for just a few minutes, and other times they'll remain illuminated for the rest of my trip. It's quite unpredictable.

There's no noticeable change in braking performance or handling when the lights are on, which is a relief, but it's still concerning to see those warnings. I've checked the brake fluid level, and it's at the correct mark.

Could this be a wheel speed sensor issue, or something more complex with the ABS module itself? It's pretty frustrating when they pop up, especially since there's no clear pattern. Any advice on how to diagnose this or what to look for?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:49 AM

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Intermittent ABS and Traction Control warning lights on your 2017 Buick Regal TourX often point to issues within the wheel speed sensing system or the ABS module itself. Since these systems are interconnected, a fault in one can trigger warnings for both.

Here are the most common causes to investigate:

  1. Wheel Speed Sensors (WSS): These sensors monitor the rotational speed of each wheel. If a sensor is dirty, damaged, or its wiring is frayed/corroded, it can send inconsistent or incorrect signals to the ABS module, causing the lights to illuminate. This is the most frequent cause of intermittent ABS/TC lights.
  2. WSS Tone Rings: The tone ring (or reluctor ring) is a toothed ring that the WSS reads. If it's damaged, cracked, or excessively dirty, the sensor won't get an accurate reading.
  3. Wiring Harness Issues: Damage or corrosion in the wiring harness connecting the wheel speed sensors to the ABS module can cause intermittent signal loss.
  4. Low Brake Fluid/Brake Fluid Pressure Sensor: While you've checked the fluid level, a faulty brake fluid pressure sensor within the master cylinder can sometimes trigger these lights, though less common for intermittent issues.
  5. ABS Module Failure: In some cases, the ABS control module itself can fail internally, leading to erroneous warnings. This is typically a more expensive repair.

When to See a Shop:

  • If a visual inspection of the wheel speed sensors and their wiring doesn't reveal any obvious damage or dirt.
  • A professional shop can connect a specialized scan tool to read ABS-specific fault codes, which are different from standard OBD-II engine codes. These codes will pinpoint which wheel sensor or component is reporting a fault.
  • If the issue persists and you're concerned about the safety implications, as a malfunctioning ABS/TC system could affect emergency braking performance.
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