Vectra fault code help

Fault code 1230 is listed as 'Supply voltage out of range' which may be being latched if the problem on your car is a bad connection for example. This code however , may be simply stored in memory and have nothing to do with the fault. The only way to determine this is to attach a scan tool with 'live-data' capability and see what supply voltage the ECU is reporting or clear the code and see if it returns whenever the vehicle cuts-out. Regards Mike

Thanks Mike,

I've also been told that it means 'engine control relay voltage low' which I suppose could be a bad connection at, or in the supply to, the relay - do you know which is the engine control relay?

Andy

Hi Group, Sorry I do not know physically where the main relay is located on your vehicle perhaps someone else can help however it is powered from pin-49 of the ECU and the supply from this relay goes into the ECU on pin-55 which is where the ECU monitors the supply voltage from. It is correct therefore that the logged fault code could be caused by this relay , but equally , any supply interruption to the system would cause the same fault.

Mike

Thanks Mike, I'll check it out.

Andy

Thanks for your help - changing the relay seems to have cured the problem!

Andy