UK Car Repair Questions? Ask a Mechanic for Answers ASAP
You need to turn the mic volume down on your phone.
Very common complaint with iPhone 6.
Hope this helps.
Have you been to the dealer?
Does it do this if you just rev the engine while standing still?
Does it do this with another phone paired to the van?
I think you should take it to the dealer.
They have the best chance of repairing this.
It sounds like a poor ground.
I hope my advice has been of assistance to you.
Have you had any luck with the dealer on this?
That's good you have sorted it.
Of course, I could have fixed it for you earlier if I was with you.
To me, it should have been quiet, even with the engine running, and only start to make noise as you were moving.
Things are difficult as a remote tech.