Hard Brake Pedal Diagnosis - Honda CR-V 2020
A consistently hard brake pedal indicates a loss of power brake assist, likely due to a failed vacuum booster, vacuum leak, or faulty brake booster check valve. This significantly increases stopping distance and requires immediate attention.
Diagnosis Details
Possible Causes
Failed brake booster (vacuum assist unit) - internal diaphragm leak or mechanical failure
Vacuum leak at the booster hose or check valve - allows air into the system, reducing assist
Faulty brake booster check valve - prevents vacuum from being held in the booster
Related OBD-II Codes
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What You Should Do
Do not drive the vehicle until repaired.
Have a certified technician inspect the brake booster, vacuum lines, and check valve.
A simple test: with engine off, pump brake pedal several times until hard, then start engine while holding pedal.
If pedal drops slightly, booster is working; if not, booster or vacuum system is faulty.
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.