So these are the codes that was detected. I got these from Autozone.
P0420 - Passenger air bag firing circuit 1 (resistance too low)
Catalyst System Efficiency Below Threshold (Banke 1)
Secondary DTCs
P0328: Knock Sensor 1 Circuit high input (Bank 1)
P1111: System check complete Since Last Memory Clear



I mentioned that I suspected it may be the catalytic converter. When I drive it rides fine. Then, as I accelerate the message reads "Performance Restricted" w/ a yellow light. The Engine light has always been on when I got the car. I noticed when the message is on. The RPMs would be stuck around 2000 (idk if this is normal or not lol) but it would struggle to accelerate.

To the knowledgeable forum...what should be the next plan of action? I was convinced I need to change the catalytic(s) but you know it $$$

Thank you all.

 

The best place for TECHNICAL questions is the relevant MODEL forum. For you this is:

https://www.jaguarforums.com/forum/s...ed-v8-x200-15/

The REGION forums are more suitable for meets and discussing recommended service and parts providers.

Graham

 

@GGG
Oops my bad lol . Thank you ill post there.