[bape000]

When I switch the car on I get the battery warning light now. I would like to know how best to diagnose this? So far I have accessed the hidden menu and noted that the battery voltage while the car is switched on is 11.2V and while the car is running/driving - the voltage sits around 14.3V.

What steps can I carry out next to determine if it's a fault battery, alternator or alternator voltage regulator?

[Rich_D]

If your battery is 11.2V when the engine is not running, it sounds like you need a new battery, how old is it?

[bape000]

Originally Posted by Rich_D

If your battery is 11.2V when the engine is not running, it sounds like you need a new battery, how old is it?

I'd probably say the age of the car. It's an 08 plate!

[Rich_D]

Originally Posted by bape000

I'd probably say the age of the car. It's an 08 plate!

As the weather gets colder it will get worse, so I would look to get a new battery fitted. It will need coding though.

[bape000]

Originally Posted by Rich_D

As the weather gets colder it will get worse, so I would look to get a new battery fitted. It will need coding though.

Thanks. Just had a look and will go for a VARTA battery. Will put my INPA to use and attempt to code it!