* Faulty ABS Sensor (even the new one): While less likely, it's possible the new speed sensor is defective. Try a different brand or source for a replacement.
* Wiring Issues: The wiring harness connecting the speed sensor to the ABS module can be damaged, corroded, or have loose connections. Inspect the wiring carefully for breaks, chafing, or corrosion, especially near the sensor connector.
* ABS Module Problem: The ABS module itself might be faulty. It's the "brain" of the ABS system and receives signals from the speed sensor. A malfunctioning module won't properly interpret the sensor's data, even if the sensor is good. This is often a more expensive repair.
* Low Brake Fluid: A low brake fluid level can trigger the ABS light. Check your brake fluid reservoir.
* Other Wheel Speed Sensors: Your Dakota has multiple wheel speed sensors (one for each wheel). A problem with *any* of them can illuminate the ABS light. The system needs all four to function correctly. You'll need to test or replace the other wheel speed sensors if the problem persists.
* Faulty ABS Ring: The tone ring (or reluctor ring) is a part of the wheel hub assembly that the speed sensor reads. If it's damaged or corroded, the sensor won't get an accurate signal. Inspecting it requires removing the wheel and hub.
* ABS Pump Motor: A faulty ABS pump motor might cause the ABS light to stay on. This requires specialized tools and diagnostics to determine if it's the issue.
How to troubleshoot:
1. Check brake fluid: The easiest first step.
2. Visual inspection of wiring: Look for damage to the wiring harness near the speed sensor.
3. OBD-II Scanner: Use an OBD-II scanner to read the trouble codes. This will pinpoint the specific problem the ABS system is detecting. The code will give you a much better indication of the root cause.
4. Test other wheel speed sensors: If the OBD-II scanner doesn't point to the speed sensor you replaced, test the others.
5. Professional diagnosis: If you can't identify the problem using the above steps, take your Dakota to a qualified mechanic specializing in ABS systems for diagnosis. They have the tools and expertise to identify the fault accurately.
Ignoring an ABS light is risky, as it means your anti-lock braking system isn't functioning. Get it diagnosed and fixed properly.
