Speedometer not working
 

Hi,

Speedometer has been working intermittently in the last week. It's done it before, but today I drove ~100 miles and the speedometer stopped working for about 75 of those miles.

Fuel gauge also likes to stick, but sometimes when the speedometer stops working it'll go up and down a quarter of a tank and just start wobbling. When the speedo stops working the mileage doesn't go up.

I'm thinking it may be the battery, because today the car would crank once, cut out, then come on again and start up but the letter "E" would appear next to the P on the information screen. Apparently I can check the voltage through the diagnostics menu so I'll do that tomorrow.

I've got no other warning lights such as the traction control or ABS light (could it still be the ABS sensor, which apparently causes these issues) so what could the problem be? I'm doing my oil change tomorrow so I'd best try and sort it whilst I'm doing that I reckon.


Cheers.

Check your plenum now !!

That's what I'll do first thing tomorrow!

We've had heavy rain recently so you're probably spot on.

Just gave the plenum a check and it's dry as a bone in there really. There's quite a lot of mouldy leaves which were damp and could hold moisture right by the ECU, so that could have caused the problem, but there was no water in there.

Hopefully this has solved the issue, but any more clues on what it could be if not that?

Only issue that I've had similar to this was getting back in my car the other week down the supermarket and all the dials were dead.

Got home and after advice on here did the old battery disconnect for 20 minutes coneccted back up and they all came back on and have been fine ever since.

If the plenum drains are partially blocked then water levels can get high when it rains and then subside over time.


The E on the dashboard may be the clue to what happened - ECM got wet and then lost communication with the automatic gearbox.


If it happens again best get it checked out - Brian does a very fast and very thorough turn around by post for the ECM if it is faulty.