Chevy LLY Duramax EGR Codes P0401, P0404

Come along with Eric O. at the SMA shop as we have a look at this Chevy 2500HD with the Duramax Diesel 6.6 LLY that has the famous EGR Code P0401 and P0404. Insufficient EGR Flow and EGR Valve Closed Performance. We run down the diagnostic procedure to diagnose and repair these codes and also flash the ECM with the latest software to make sure it is up to date. The we show the importance of retesting your work and running the monitor. Interested in stuff seen in the videos or the tools and toys Eric O. likes and uses? Check out the S.M.A. "A-Store" and help support the channel! : http://astore.amazon.com/httpswwwy083... If an SMA Video has helped you out please consider giving using "Patreon" to help support us. The videos take real time to create and pull us away from real work that pays our bills. CLICK HERE:   / southmainauto   THANKS A MILLION!! --Eric O. WANT AN "SMA" STICKER OF YOUR OWN!?! Simply send and E-mail to [email protected] including: your shipping address and e-mail address in the text, I in turn will send you a paypal invoice for $5 each USA or $6 each international. Let me know how many you want and as soon as the paypal invoice is paid I will ship them out ASAP! Thanks for your support of our channel!! --Eric & Vanessa O. Feel like sending some swag to SMA because you love the videos but don't know where to send it? Just ship it here: South Main Auto Repair 47 S. Main St PO Box 471 Avoca, NY 14809 Disclaimer: Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, 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 South Main Auto Repair.