CM2250 won’t boost over 20 psi

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No other codes? Check the connection on the sensor. Might sound stupid but ive seen quite a few with a bit of moisture in them and that will make for a long day. Check ecm connections and bulkhead. A man with a pressure washer can do a lot of damage that may not pop up for months

Verify the egr valve is working properly as well as the VGT. Both can cause high intake temps.