The excessive CO2 emissions were discovered by the British vehicle certification agency, who then reported it to JLR. The company is reportedly working on a fix that will satisfy the agency and bring the cars back in line with their stated CO2 emissions. As of now, JLR is not saying what the fix will entail.
A statement from JLR reads: "The modifications will be made free of charge, and every effort will be made to minimize inconvenience to the customer." The U.K. magazine Which? said JLR told them owners might experience minor changes to the "overall vehicle experience."
Reading between the lines there, that sounds like there could be some pretty serious tampering with the engine software, but we'll leave the speculation to a minimum for now. CO2 emissions numbers are used in the U.K. to set tax levels for vehicles, which means JLR could have gotten out of some taxation with its artificially low CO2 numbers. At this point we don't know how badly the numbers are off, so it's impossible to know how egregious the mislabeling is. There also isn't any explanation for why the CO2 numbers are off, but this is all information that could be forthcoming. The 44,000 number could rise, too, because the UK vehicle standards agency says that some gasoline models could also be involved. That would open a whole new can of worms for JLR.
Some Jaguar vehicles (XE, XF and F-Pace) offer a 2.0-liter diesel option for the U.S., but Land Rover's only diesel it sells here now is the 3.0-liter V6. For the time being there's no recall out on the diesel or gas engines from JLR in the U.S. There's no chatter surrounding emissions cheat devices like those involved with Volkswagen's diesel emissions scandal. Nor does the scale of whatever the problem is come anywhere near the amount of Volkswagen diesels that needed to be recalled or taken off the roads. We'll be keeping tabs on the situation to see if this expands any further than the U.K.