ABS Warning Light Always On – 2020 Chevrolet Silverado 1500
The ABS warning light is constantly illuminated, indicating a fault in the anti-lock braking system. This does not necessarily mean the brakes will fail, but ABS functionality is disabled, which could affect braking performance in slippery conditions.
Diagnosis Details
Possible Causes
Faulty wheel speed sensor – most common cause, often due to dirt, damage, or wiring issues.
Damaged ABS tone ring or reluctor ring – can cause erratic sensor readings.
ABS module failure or internal fault – less common but possible on this model.
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 wheel speed sensors and wiring for damage or debris.
Check the ABS fuse and relay.
If codes point to a specific sensor, replace it.
If the module is faulty, it may need reprogramming or replacement.
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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.
