Share this:TwitterFacebook Automotive Diagnostic Engine Video P0400 EGR Valve Fault – Step By Step Guided Repair Written by Spanner on November 29, 2021 ‘In this video I go through the step by step process of diagnosing and fixing an engine management light warning fault in a Ford Focus. The fault was related to the Exhaust Gas Recirculation valve (EGR) Flow. I detail the signs of a bad EGR valve.’ Share this:TwitterFacebookLike this:Like Loading... Related TweetSharePinShare0 Shares