Fuel gauge and tachometer needle in negative

[WildGoose]

My instruments show negative fuel and rpm while the ignition is off, and way less than real values while it is on. I got a vcp+diag cable at hand, can this be fixed just via the software/reprogram the instrument module? I am fine using the hex editor, done that before on the central electronics.

 

The car is an octavia II facelift, 2011 model.

[langers2k]

Can you get a picture/video to show what you mean?

 

At a guess, the needles will need removing and refitting at the correct angle.

[WildGoose]

(Tank is full)

[WildGoose]

6 hours ago, langers2k said:

Can you get a picture/video to show what you mean?

 

At a guess, the needles will need removing and refitting at the correct angle.

Tried refitting the needles, didn't help. Will give it a second try...

[langers2k]

When I've refitted needles, the easiest way I found was to:

- take the cluster apart

- remove the needles

- refit them very lightly

- connect the cluster to a car or testbench

- use VCDS to do an output test on a gauge

>> this causes the needle to go to max, then min, then hold in the middle

>> adjust the needle to point directly up

>> stop the output test and re-run it

>> if the needle still points directly up, refit it properly

>> stop the output test and re-run it to confirm the position

- repeat for the other three gauges

- put the cluster back together

 

Simples

 

Those dial facias look aftermarket to me?

[Eddie-NL]

The scales don't look original, have they been changed?

 

[WildGoose]

7 minutes ago, Eddie-NL said:

The scales don't look original, have they been changed?

 

Yes, replaced the metric dials.