Hi,

I got a check engine light 50420 KM. I took it to local mechanic just to get the codes:

P014A Heated Oxygen Sensor - Delayed response - Bank 2
P0300 Random Misfire detected
P0301 - Cylinder 1 misfire detected
P0305 - Cylinder 1 misfire detected
P0306 - Cylinder 1 misfire detected
P0430 - Catalyst system efficiency below threshold (bank2)


I have noticed any decline in performance or anything I can gauge.
I did find out this could be misdiagnose for the misfire, and it could be related toe oxygen sensor.
Any guidance would be appreciated. Will be taking to Jaguar for diagnostic and they're gonna charge $300 for that.

 

For sure its not over. Sounds like a plug, coil, or wiring harness issue. And, of course, it may be nothing. I've triggered all kinds of interesting codes when driving hard, cleared them, and never had them return. Keep us posted, but I think you'll be just fine.

 

Could also be a wiring problem. If you have rodents in your area, they are known to chew on the wiring harnesses.

 

Had friend on a car discord, listen to rev of the car. He said it's all fine. I been driving it for 4 days haven't noticed a difference in the performance or any odd new sounds. Fingers crossed its false positive. I booked my appointment for Thursday.

- No rodents, very clean area. Garage kept.

 

Could the misfire codes be from a previous incident that weren't cleared when the problem was fixed? Best to clear the codes and see which come back.

 

So an update; It was the catalyst converter and no o2 sensor. Jaguar apparently covers o2 and catalyst for 10 years. So all under warranty. Pretty happy with that, its gonna take a week for the part to arrive. They said I could drive the car normally.