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ABS Light and VSA Light On My 2016 ILX

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Chris P. · rep 0 · May 25, 3:41 AM · 1 replies · solved · Question

Vehicle: 2016 Acura ILX 2.4L Tech

My 2016 Acura ILX (2.4L Tech) recently had both the ABS light and the VSA (Vehicle Stability Assist) light come on simultaneously on the dash. They both illuminated at the same time and have stayed on. The brakes still seem to work normally, and I haven't noticed any strange noises or feelings when braking.

I'm worried about safety, especially since these systems are important for control. What should I check first? Is there a common issue that triggers both of these lights on an ILX? I don't have an OBD scanner, but I'm thinking of getting one if it will help diagnose this.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:41 AM

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ClearTheCode admin answer:

When both the ABS (Anti-lock Braking System) and VSA (Vehicle Stability Assist) lights illuminate simultaneously on your 2016 Acura ILX, it's a strong indicator of an issue within the wheel speed sensor system or the ABS module itself. These systems are interconnected, as VSA relies on the same wheel speed data as ABS.

Here are the most common causes:

  1. Faulty Wheel Speed Sensor: Each wheel has a sensor that monitors its rotation speed. If one of these sensors fails, gets dirty, or its wiring is damaged, the ABS and VSA systems lose critical data, triggering the warning lights. Common OBD-II codes associated with this include C1100 (Right Front Wheel Speed Sensor Failure), C1101 (Left Front Wheel Speed Sensor Failure), C1102 (Right Rear Wheel Speed Sensor Failure), C1103 (Left Rear Wheel Speed Sensor Failure).
  2. ABS Module Failure: While less common, the ABS control module itself can fail. This is a more expensive repair but would also trigger both lights.
  3. Wiring Issues: Damaged wiring or corroded connectors leading to the wheel speed sensors or the ABS module can interrupt communication, causing the lights to come on.
  4. Low Brake Fluid (less common for both lights): Extremely low brake fluid can sometimes trigger brake-related warnings, but usually, it's just the brake system warning light, not typically ABS/VSA together.

When to See a Shop:

  • Scan for Codes Immediately: Your best first step is to get an OBD-II scanner that can read ABS/VSA specific codes (not all basic scanners can). This will pinpoint which sensor or system is reporting the fault. Auto parts stores often offer free code scanning.
  • Safety First: While your regular brakes may still function, the ABS and VSA systems are disabled when these lights are on. This means you won't have anti-lock braking in an emergency stop, and the vehicle's stability control won't intervene if you lose traction. Drive cautiously, especially in adverse conditions.
  • Professional Repair: Once the code is identified, a mechanic can diagnose whether it's a sensor replacement, wiring repair, or a more complex module issue.
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