Hello All, wonder if anyone can please help with the below:
My speedo goes up to the maximum 155 mph, and shows this speed no matter what speed i'm doing, the MPG gauge is also showing the incorrect reading (does not really move), when i brake the speedometer goes back down to zero, when i accelerate the needle shoots all the way up to the end of the dial. As this is not the wheel sensor as previously thought (according to a mechanic who did a quick inspection following changing one of my rear wheel bearings), any ideas what the hell this could be? The guy at the garage reckons its electrical so nothing he can help with, so far no ones seems to have a clue!! Luckily I have the sat nav to show the speed i'm doing so i can still drive..
The rev counter and all other dispays on the dash are fine, no error codes..
Also, if i disconnect the battery for a short period will this help??
I have a E46, 318, 2000 year model. Many thanks.