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- Tue May 08, 2018 3:30 pm
- Forum: Configuration and Programming
- Topic: P1635 or U0422 in TCM or PCM after tire size change
- Replies: 30
- Views: 19064
Hello I changed my rear axle ratio in a 2017 Mustang Gt PP from 3:73 to 3:55 in the BCM. I am getting a U0422-2F DTC instead of the DTC you are mentioning. When I run the PCM relearn procedure it doesn’t resolve the DTC. When I set the ratio back the DTC resolves. Is it just that I can not start the...