Event Code 253 means there is a miss match between the height switches. When fully lowered go into the service menu, analyzer menu, then watch A4.11 (HGTS20), A4.12 (HGTS84), and A4.13 (HGTS118).
When fully lowered all of the inputs should be 1. If any of them change to 0 while lowered and driving, that is the height switch causing the event code to appear. This either means the switch is going bad or there is a wiring problem.
If all the inputs stay at 1 when the event code appears then it could be an issue with the access 4 module.
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