Jaguar Reviews

The temptation is to assume that the car is simply low on AdBlue (an additive that is sprayed into the exhaust of diesel engines to clean up their tailpipe emissions and make them less toxic). When this is depleted, the engine is programmed to warn the driver that the level is low, and then not to restart until the AdBlue has been topped up. This is possibly what the dealership did to remove the warning.

But there’s a chance that the AdBlue injecting system has a fault somewhere and the problem is not as simple as low AdBlue fluid. That’s why the error message has returned. Or, you may simply have a dud sensor that continues to think the AdBlue tank is empty.

Jaguar began the switch from the EcoBoost engine to the Ingenium unit in its cars late in 2015. In the XE model, however, that change didn’t occur until late 2017, so a car with a build date after that should have the newer unit. The problem is that a car sold in 2018 (by the time it arrived in Australia) could easily have been built sometime in 2017 and, therefore, could carry either engine. For the definitive answer on what engine a particular car has, the best idea is to check the car’s VIN with Jaguar Australia or a Jaguar dealership.

You’ve probably hit the nail on the head, and it is a seat-belt warning you’re hearing. Even though you may have the belt properly fastened, if the sensor that is supposed to detect the seat-belt being latched is not working, then the car will think you’re driving around unrestrained.

Jaguars of this era were not universally known for the quality of their electronics, so it’s very possible that this is precisely the problem. The catch then is that you need to check each seat-belt for a dud sensor, and there are five of them in the S Type. Other things that could trigger the same sort of alarm could be that the park-brake is not fully released or that there’s a door or bootlid ajar. Check it all and rule things out one by one.