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ABS and Traction Control Lights On - 2019 Dodge Grand Caravan SXT

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Mike T. · rep 0 · May 25, 4:16 AM · 1 replies · solved · Question

Vehicle: 2019 Dodge Grand Caravan SXT

Hi all,

I've got a 2019 Dodge Grand Caravan SXT with about 55,000 miles on it, and recently, both the ABS light and the Traction Control light (the one that looks like a car skidding) have come on and stayed on. They came on simultaneously, and I haven't noticed any immediate changes in braking or driving feel, but it's definitely concerning.

I tried turning the car off and on, but they just stay lit. I'm wondering if this is a common issue for Grand Caravans. Does anyone know what might be causing this, or if there's a specific sensor that usually goes bad? I'm hoping it's not a major repair. Thanks for any insights!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:16 AM

0

ClearTheCode admin answer:

When both your ABS and Traction Control lights illuminate simultaneously, it indicates a fault within the Anti-lock Braking System (ABS) or a related sensor. Since the Traction Control System (TCS) relies on the ABS for wheel speed information, a problem with one often triggers the other.

Common Causes:

  • Wheel Speed Sensor (WSS) Failure: This is the most common cause. Each wheel has a sensor that monitors its rotational speed. If a sensor becomes dirty, damaged, or fails electrically, the ABS module loses critical data, triggering the lights. Common OBD-II codes associated with this include C0031 (Left Front Wheel Speed Sensor Circuit), C0034 (Right Front), C0037 (Left Rear), C0040 (Right Rear).
  • Damaged ABS Wiring/Connector: The wiring harness or connectors leading to the wheel speed sensors can get corroded, cut, or become loose, interrupting the signal.
  • ABS Module Failure: While less common, the ABS control module itself can fail. This is usually a more expensive repair.
  • Low Brake Fluid: Extremely low brake fluid can sometimes trigger these lights, though usually, a separate brake warning light comes on first.
  • Faulty Tone Ring: The tone ring (or reluctor ring) is a toothed wheel that the WSS reads. If it's cracked, bent, or filled with debris, it can send incorrect signals.

Troubleshooting Steps:

  1. Check Brake Fluid Level: Ensure your brake fluid reservoir is at the proper level.
  2. Visual Inspection of Sensors and Wiring: If you can safely access them, visually inspect the wheel speed sensors at each wheel for obvious damage, and check the wiring for cuts or loose connections.
  3. Retrieve OBD-II Codes: The most crucial step is to get the vehicle scanned for diagnostic trouble codes (DTCs). Most auto parts stores offer this service for free. Look for 'C' (Chassis) codes, which relate to the ABS system.

When to See a Shop:

Even if you don't feel an immediate change in braking, your ABS and Traction Control systems are currently disabled. This means your vehicle will brake like a non-ABS car, and you won't have the benefit of traction control in slippery conditions. It's important to have this addressed by a professional mechanic promptly. They can:

  • Accurately read and interpret the specific diagnostic codes.
  • Perform detailed electrical tests on the wheel speed sensors and wiring.
  • Replace the faulty component (e.g., a wheel speed sensor or damaged wiring) and clear the codes.
  • If necessary, diagnose and replace a faulty ABS module.
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