Andrew Markel is the editor of Underhood Service magazine. He has been with Babcox Media for 15 years. He is a technician and former service writer and holds several automotive certifications from ASE and aftermarket manufacturers. He can be reached at [email protected]
Andrew Markel explains how modern vehicles have pressure sensors that send out a voltage signal, and how a diagnosis can be made by measuring the signals with a scope. Sponsored by Auto Value and Bumper to Bumper.