Soft Brake Pedal During Hard Braking
The brake pedal feels soft or spongy when applying hard braking, indicating a potential issue with the brake hydraulic system, such as air in the lines, a fluid leak, or a failing master cylinder.
Diagnosis Details
Possible Causes
Air in the brake lines (contaminated or low brake fluid)
Brake fluid leak (at calipers, wheel cylinders, or lines)
Failing master cylinder (internal bypass or seal failure)
Related OBD-II Codes
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What You Should Do
Do not drive the vehicle until brakes are inspected.
Check brake fluid level and condition.
Look for leaks around calipers, lines, and master cylinder.
Bleed the brake system to remove air.
If problem persists, test master cylinder and replace if necessary.
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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.
