Greetings, bought a 2016 dodge ram dually last year with 13k miles from maher chevy last year. i was told it was still under the factory warranty. i called jerry ulm dodge today to bring it in for a code p2609 and a ticking sound after it warms up under warranty. they checked the vin and said it it has no warranty and is restricted. told me to call ram. they looked it up and said the emissions/engine was tampered with. they couldn't tell me any more.only thing i see is a K&N air filter on it. the cats look to be intact. i have a call in to mahers salesman. the car fax was clean and noted that the warranty was still active with 19 months full coverage at the time. it was actually sold to auction by Philips dodge in 2017 with 13k to auction and bought 2 months later by Jerry ulm who sold it to auction 4 months later that maher Chevy bought . (should have been a red flag.) any advice would be appreciated.