Chevy LLY Duramax EGR Codes P0401, P0404
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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…
Source: South Main Auto Repair (2022-09-06)