I bought an 05 RR and after one month the engine light came on. I took it back to the dealer and he replaced the 2 front o2 sensors. The next day the light came back on so I went back to the dealer and he swapped them with a new set, thinking that the original new o2 sensors may be faulty.I pick the car up and less than 30 minutes later the light came back on. Knowing I was getting nowhere with the guy about the car from, I decided to take it to an actual Land Rover dealership. After reading that RR has an issue with the catalytic converters cracking I asked the Land Rover technician to look for that as well. He told me that the cats look like they were replaced but had no record of any past work done under warranty. Also he said that the front o2 sensors looked new. I left there with no answers. I did some digging and found the original dealership that the range was serviced at and emailed them. I gave them the VIN and they told me that the passenger side cat was replaced in 08. The problem is, I don't know what these codes mean or if my catalytic converters are even the problem. I was hoping that someone on this forum may be able to give me some insight. Thanks in advance.