Hello everyone.
This is my first time posting on the forums. I have a 2015 Jaguar XF 2.0T petrol. It had no issues for the last 6 months that I've had it. Today, I drove through a puddle of water on my way home. When I went out after 20 mins to start the car again, a check engine light came on. Got it scanned for the following codes
P0420
P0341

When I cold start it sometimes, the engine rattles when cranking and the sound goes away after starting. I've read a few posts about people adding additives to their tanks and getting it fixed, but I'm concerned about this new rattle that has come on.

Regards,
Arnav.
Thank you.