Brake issue after wreck

[XLpracticool]

Unfortunately I rear ended a little Mazda HB the other day. Yukon is ok, but I have brake issues (was absolutely standing on them when we hit). When running the pedal stays about half way down and the brakes act like the pedal is being pushed. I can lift the pedal with my left foot while driving and it’s fine(only drove it 7mi home like this, been parked since).

I can hear a vacuum leak under the dash, but can’t pinpoint it.

Throwing 2 codes C0299-5A brake booster large vacuum leak detected

C0161 antilock braking circuit brake switch circuit

Thanks in advance for any insight

 

[mikez71]

Sounding like your vacuum booster is busted.
Listen for the leak in the engine compartment by the brake booster/master cylinder.

 

[XLpracticool]

You can hear it in the engine bay and the drivers footwell. Kinking the main vacuum line going into the booster makes the noise stop. Removed booster, just a little fluid from master in the bottom of it. Could this be from the vacuum leak or do I need to replace both? Master isn’t low and I never have to add fluid.

 

[swathdiver]

You can hear it in the engine bay and the drivers footwell. Kinking the main vacuum line going into the booster makes the noise stop. Removed booster, just a little fluid from master in the bottom of it. Could this be from the vacuum leak or do I need to replace both? Master isn’t low and I never have to add fluid.

Replace the master cylinder too.

 

[XLpracticool]

Will do. Thanks