ABS Warning Light Always On – 2020 Ford Mustang
The ABS warning light is constantly illuminated, indicating a fault in the anti-lock braking system. This means ABS functionality is disabled, but normal braking should still work. However, the vehicle may not have stability control or traction control assistance.
Diagnosis Details
Possible Causes
Faulty wheel speed sensor (most common on Mustangs due to debris or corrosion)
Damaged or corroded ABS tone ring (often caused by rust or road salt)
ABS module failure or internal electrical issue
Related OBD-II Codes
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What You Should Do
Have the ABS system scanned with a professional diagnostic tool to retrieve trouble codes.
Inspect all four wheel speed sensors and tone rings for damage or debris.
Check wiring and connectors for corrosion or breaks.
If necessary, replace the faulty sensor or tone ring, or have the ABS module tested/repaired.
Related Repairs
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.