Hi
I think someone looked in the handbook.
We have some Jeep dealers that were Fiat Dealers who had Jeep pushed onto them over the last few years. Frankly when it comes to our older WH they do not know their arse from their elbows.
Are your dealers jeep ones that have been at this a long time?
For what it is worth this is a vid from a jeep specialist over here.
Another specialist did say the egr can throw the light too.
Will be interesting to see what codes the jeep scanner pulls.