Here we go again...so to address the p1383 code had the reflash done as well changed the oil to 10W40 blend. The P0430 code was
addressed by replacing the
cat. My mechanic reset the CEL but it came back on after 20 miles. Should I be concerned about a bigger problem at this point now? The Kag dealership did a diagnostic and didnt find anything else

 

Sounds like it must be the remaining cause(s) listed in the codes PDF

 

Just came back from another Jag dealership who basically said it was definitely a VVT issue and said they could do one of two things other than what they've already done 1) change the selanoid, which they didn't recommend as it wasnt guaranteed to fix the CEL or 2) replace the engine. The head mechanic said the cause was wear on the engine and that it would be fine to drive on despite the CEL being on. he also said to make sure I buy a code clearing machine so that I could reset it before I took an emissions test as it won't pass otherwise. Any thoughts? Thanks so much as always

 

Be sure to find out the exact requirements re OBD for your local emissions/inspection laws. They may make or break that idea. If you post them I can try to explain but I can't go looking through your state laws

Generally, you'd have to clear a while before an inspection so that the monitors Complete (aka Set) - look up the law about those too (same law I expect).

The solenoid may be DIY - try a Search as I think someone did it.