2012 4.4 v8 Deisel
Started this morning and got the red triangle with the words “critical engine systems”

Has anyone had this?

Well, I connected to GAP iid and these were the only four engine errors showing:

Click image to enlarge

Can you clear them (DTC) and see what returns as some of these have activated at a different mileage, the last being throttle peddle position, which must be the culprit 2018 SE SDV8 4.4 Byron Blue

Usual cause of this error is:

A) dirty MAP sensor. When was it last cleaned?

B) failed o-ring inside the plastic pipe connection on the throttle body - check for oily soot in the vicinity. Diagnostic / temporary fix is to use gas spec PTFE tape or silicone tape wrapped around the throttle body union

C) A split donut hose or top intercooler hose. Check for splits in the small 4 hoses on the donut and the 2 large ones near the front of the engine bay

Once all are covered, try a steady motorway cruise for 20 miles and if it still hasn't cleared / returns, force a DPF regen with the IID tool. 2015 Range Rover Autobiography 4.4 SDV8

Kot wrote:

Can you clear them (DTC) and see what returns as some of these have activated at a different mileage, the last being throttle peddle position, which must be the culprit