Knaus says appeal was about understanding penalty process:

Jimmie Johnson’s # 48 team won its appeal Tuesday to overturn a P1 penalty, but crew chief Chad Knaus still awaits more clarity on its exposure to future punishment. NASCAR issued the penalty of last choice in pit stalls for the next race after the team received written warnings in consecutive Sprint Cup events. Written warnings are cumulative over the course of a season, and if a team receives six over a six-month period following the first, it could result in a P2 penalty. Per the 2015 NASCAR rulebook, a P2 penalty would result in at least one (and possibly more) of the following: loss of 10 championship driver and owner points; $10,000-$25,000 fine; suspension for the crew chief,and/or any other team members for at least one race; probation through the end of the calendar year for the crew chief. Johnson’s team has received at least four warnings this season and could face another after failing prerace inspection three times Sunday at Pocono Raceway.
Knaus said Hendrick Motorsports’ appeal was as much about understanding the new system, which was introduced last year, as contesting the penalty. “If you look at the way warning schedule is, and the way the penalties can start to accumulate over a period of time, we needed to understand the methodology behind that, and we have a better understanding of that now,” he said. “I think that with all the teams and NASCAR, we’re all going to have some more conversations in the future about how the warnings are applied and can be contested. That was the big reason we’re here. We need to get in here and understand the format, the system and thankfully, we have a system like this. I think it’s great that NASCAR is willing to have an open forum to where we can get together, chat and have a face to face conversation about it and try to get some clarification.”
The tricky part of the new system is a warning isn’t appealable, but a punishment resulting from a warning is. NASCAR, at its discretion, can issue P1 penalties based on multiple warnings or warnings in consecutive events.(NBC Sports) (6-10-2015)