Join Date: Mar 2019
My Motorhome: I drive...
Thanked 0 Times in 0 Posts
I have the same code P0271 cyclinder 4 over voltage. Wiring loom all tested OK, connections all cleaned and engineer is awaiting new brake switch from Fiat as it only happens when using cruise control. In 1,000 miles activated twice. Reset on road with OBF11 unit so can carry on.
Letâ€™s see what happens after new switch is fitted.