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ABS and Traction Control Lights On - 2018 G80 3.8

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Angela R. · rep 0 · May 22, 6:18 AM · 1 replies · solved · Question

Vehicle: 2018 Genesis G80 3.8

Hey everyone,

I'm looking for some advice on an issue I'm having with my 2018 Genesis G80 3.8. Recently, both the ABS warning light and the Traction Control (ESC) light have come on simultaneously on my dashboard. They've been on for a few days now and haven't gone off.

The car seems to drive and brake normally, at least from what I can tell. There's no strange grinding or pulling when I hit the brakes, and the steering feels fine. However, I know these lights indicate a problem with critical safety systems.

Has anyone experienced this with their G80 or a similar Genesis model? What could be the potential causes for both lights to illuminate at the same time? I'm trying to figure out if this is something I can check myself or if it's an immediate trip to the dealership. Any insights would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 6:18 AM

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ClearTheCode admin answer:

It's concerning when both your ABS and Traction Control (ESC) lights illuminate, as they are interconnected safety systems. While your car may feel normal, these systems are likely disabled, which can impact your vehicle's stability and braking performance in emergency situations.

Here are the common causes and steps to consider:

  1. Wheel Speed Sensor Failure: This is the most frequent culprit. Each wheel has a sensor that monitors its rotation speed. If one fails, the ABS and ESC systems lose crucial data, triggering both lights. A common OBD-II code associated with this might be P0500 (Vehicle Speed Sensor Malfunction) or specific C-codes (e.g., C0031-C0035 for individual wheel speed sensor issues).
  2. Damaged Wiring or Connector: The wiring leading to a wheel speed sensor can get damaged by road debris, or the connector might become corroded or loose, leading to an intermittent or complete signal loss.
  3. Low Brake Fluid Level: While less common for both lights, extremely low brake fluid can sometimes trigger warnings related to braking system integrity.
  4. ABS Module Malfunction: In rarer cases, the ABS control module itself can fail. This is a more expensive repair but can cause a range of warning lights.

What to do:

  • Check Brake Fluid: Pop your hood and check the brake fluid reservoir. Ensure it's between the MIN and MAX lines. Top it off if necessary with the correct DOT fluid specified in your owner's manual.
  • Visual Inspection: If you're comfortable, visually inspect the wiring leading to each wheel, especially near the brake calipers and suspension components, for any obvious damage.
  • Scan for Codes: The most crucial step is to get the vehicle scanned for diagnostic trouble codes (DTCs). A standard OBD-II scanner can read engine codes, but an advanced scanner is often needed to read ABS-specific C-codes. This will pinpoint the exact sensor or system that's reporting an issue.

When to see a shop:

  • Immediately: If you notice any change in braking performance, a soft brake pedal, or unusual noises when braking, do not drive the vehicle and have it towed to a qualified mechanic or Genesis dealership.
  • As soon as possible: Even if the car feels normal, the ABS and ESC systems are vital for safety. You should schedule an appointment to have the vehicle diagnosed and repaired promptly. Driving without these systems can be dangerous, especially in adverse weather conditions or during sudden stops.
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