Its a very very quirky system with many undocumented 'features'...mine won't open on the fobs now but opens on the buttons..no errors..no logic..go figure..the CTM module that controls it is not very bright..so error diagnostics are poor..substitution is often the key strategy..
Even though it worked fine before it sat up over winter? I'm not fortunate enough to have a garage so it lives outside, lol. I kind of feel it's damp, corrosion related.