VE HSV GTS contact dealer

[Needhelpplease]

Hi,
I own a 2007 HSV GTS and have had no luck fixing the contact dealer error code.

It has been like this for a year. It comes up with stability control off and ABS fault. It then comes up displaying the dreaded cross with contact dealer.

I have connected the OBD and it comes up with cannot communicate with the ECU.
Found a suspension position sensor that needed replacing and replaced that. Replaced the suspension control module, replaced the alternator. Have tested the ecu and the only thing we haven’t tested as of yet is the battery.

Does anyone have any ideas on what it possibly could be other than the battery at all?

 

[Commo64]

we haven’t tested as of yet is the battery.

This is the first thing you should check when you get a multitude of codes as it can save a lot of time and money... Stop everything and test the battery...

Keep us updated

 

[Needhelpplease]

We’ve tested the battery and put a new battery in and still the exact same is happening.

 

[lout]

have it scanned with an expensive scan tool

 

[Needhelpplease]

Ok

 

[lout]

check your relays
if ecm had no power car would not run