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What The ABS Light Means During Stops
The ABS module watches wheel speed sensors at each wheel. During a stop, wheel speeds drop to near zero. If one sensor drops out, spikes, or reads differently than the others, the module stores a fault and may turn off the ABS. The truck still has normal braking, but ABS, traction control, and stability features may be reduced or shut off.
A red brake warning light is different. If you see a red brake light, feel a soft pedal, hear grinding, or feel pulling, stop driving and get help.
Common Causes We See On RAM Trucks
Low-speed ABS warnings often come from sensor signal problems. The cause can be the sensor itself, wiring, corrosion, or the mechanical parts that the sensor reads.
Common causes include:
- Wheel speed sensor contamination or failure
- Sensor wiring damage near the wheel or frame
- Corrosion at the sensor connector pins
- Wheel hub bearing play that disrupts sensor readings
- Tone ring damage or buildup that changes the signal
- ABS module faults on some models
A Few Codes That Often Show Up
Codes vary by year and platform, but these appear often in scan results.
- C0037, C0042, C0047, C0052: Wheel speed sensor circuit codes, often tied to a specific corner
- C102A type wheel speed performance codes: Signal plausibility issues at low speed on some systems
- U codes: Module communication or power issues, often tied to wiring or voltage problems
Common Repairs That Fix Low Speed ABS Lights
Once we confirm the source, repairs are usually direct. Common fixes include:
- Replace a failed wheel speed sensor when serviceable
- Repair damaged wiring and secure routing away from rubbing points
- Clean and protect connectors, then confirm steady readings
- Replace a hub and bearing assembly when the sensor is integrated, or the bearing is loose
- Address tone ring damage when present
After repair, we clear codes, road test, and confirm the light stays off during multiple stops.
What You Should Watch For Until It’s Fixed
If the ABS light is on, drive with more space in front of you. Avoid hard stops on wet roads. Pay attention to any change in pedal feel. If the red brake light comes on, or if the pedal feels soft or the truck pulls, stop driving and arrange service.
Get a RAM ABS Diagnosis Today
If your RAM ABS light turns on during stops, schedule service with Driven Auto Care of San Ramon, CA. We will confirm the cause, explain the brake safety risks clearly, and complete the repair so your truck stops with better control again.