I think it was the P0405 EGR circut low something like that, it would kinda chug a little then the service light came on then i reset it and it came on again after a few miles i dont have the egr delete any advice would be nice. Thanks
If you think it was that code, then check the connector on the egr valve. It may be loose or dirty causing a bad connection. What are you using for the DPF delete? That could be an issue too.
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