I haven't driven in cold weather since, unfortunately I have no idea what was causing it but my issue is very similar to yours. I also found that if I reduced speed the restrict would drop. For now I am chalking it up to ice build up, but if I come across an answer from a mechanic I will post.
2024 579 x15 100% air restrict
Discussion in 'Peterbilt Forum' started by DVKtrucker, Jan 14, 2024.
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