In this video show how I test for a bad brake booster and check valve. Testing a brake booster for leaks is pretty easy and doesn't require a bunch of tools. The exact vehicle in this video is a 2002 Toyota Tacoma pickup truck. Enjoy!

P0171 diagnosis on this truck:    • P0171 Trouble Code: System Too Lean B...  

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Tools used:
OTC 5213 pressure/vacuum gauge: https://amzn.to/2GZJgVM

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Due to factors beyond the control of the Big Dog50001 Automotive Channel, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. The Big Dog50001 Automotive Channel assumes no liability for property damage or injury incurred as a result of any of the information contained in this video.

The Big Dog50001 Automotive Channel recommends safe practices when working with power tools, in on or around automobiles or other vehicles, automotive lifts, lifting tools, jack stands, electrical equipment, automotive modules and systems, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of the Big Dog50001 Automotive Channel, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not the Big Dog50001 Automotive Channel.