Soft Brake Pedal Diagnosis - Tesla Model Y 2021
The brake pedal feels soft or spongy at all times, indicating a potential issue with the hydraulic brake system or the regenerative braking system's interaction. This could be due to air in the brake lines, a brake fluid leak, or a malfunctioning brake booster.
Diagnosis Details
Possible Causes
Air in the brake hydraulic system (e.g., from low fluid or recent service)
Brake fluid leak (at caliper, line, or master cylinder)
Faulty brake master cylinder or booster (including electronic booster in Tesla)
Related OBD-II Codes
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What You Should Do
Check brake fluid level and condition.
Inspect for visible leaks around calipers, lines, and master cylinder.
If fluid is low, top off and bleed brakes to remove air.
If no leaks, have a professional diagnose the electronic brake booster or master cylinder.
Do not drive if pedal sinks to floor.
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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.
