2018 Charger R/T ABS/Traction Control Light On - Grinding Noise?

Hi Chris P.,

It sounds like you're dealing with a common issue that can trigger both your ABS and Traction Control lights, especially when accompanied by a grinding noise and a change in pedal feel. This combination often points to a problem within your wheel speed sensor system or potentially a related brake component.

Here's what you should investigate:

1. Check for Diagnostic Trouble Codes (DTCs):

   • The first step is to get the vehicle scanned for codes. While generic OBD-II scanners might show powertrain codes, you'll need a more advanced scanner (or a visit to a shop) to read ABS-specific codes.
   • Look for codes in the C0031-C0034 range, which typically indicate a fault with a specific wheel speed sensor (e.g., C0031 for Front Left, C0032 for Front Right, etc.). Other relevant codes could point to the ABS module itself or wiring issues.

2. Inspect Wheel Speed Sensors and Wiring:

   • A faulty wheel speed sensor is a very common culprit. These sensors monitor wheel rotation and are crucial for both ABS and traction control.
   • Visually inspect the wiring leading to each wheel speed sensor for any signs of damage, fraying, or corrosion.
   • Check the sensor itself for physical damage or excessive dirt/debris buildup, especially on the tone ring (the toothed ring the sensor reads). The grinding noise could be related to a damaged tone ring or a sensor making contact.

3. Brake System Inspection:

   • Since you mentioned a grinding noise and a soft pedal, it's critical to inspect your brake pads, rotors, and calipers, particularly on the front passenger side. Worn brake pads can sometimes cause grinding, and if they're severely worn, it can affect pedal feel and potentially trigger ABS issues if a caliper isn't functioning correctly. Check for uneven rotor wear or damage.

Common Causes:

• Faulty Wheel Speed Sensor: Most frequent cause.
• Damaged ABS Tone Ring: The ring the sensor reads can get corroded or damaged.
• Wiring Harness Issues: Damaged or corroded wiring to the sensor or ABS module.
• ABS Module Failure: Less common, but possible, especially if multiple sensors are reporting issues or no communication.
• Severely Worn Brake Components: While not directly causing the ABS light, severe wear can exacerbate or be confused with other issues.

When to See a Shop:

• Immediately: If the grinding noise is severe, the brake pedal feels dangerously soft, or braking performance is significantly compromised. Driving with compromised brakes is a serious safety risk.
• If DIY diagnostics don't yield results: If you can't read the specific ABS codes or visually identify the problem, a professional shop has specialized diagnostic tools and expertise.
• For complex repairs: Replacing an ABS module or diagnosing intermittent wiring issues often requires professional equipment and knowledge.

Address this issue promptly, as both ABS and Traction Control are vital safety systems.