Hi, I've a Nov 2016 Octavia 1.4 tsi. Purchased in the Bristol UK and brought home to Dublin. I purchased the car in Feb 2020, just before the madness of Covid!

 

All was good for a while, I changed the interior lights for LEDs and got a stop start error. A friend of mine has an OBD so he clear the fault and all was ok again.

 

Happened again while cleaning the interior with the radio on, pointing to the battery. I tested the battery and it wasn't good. I replaced it with the new type with higher amps. All ok again.

 

2 days ok I was sitting in the car with the keys in the ignition turned once to have the radio on while sending a few texts. Started the car and off I went. Less than 10 mins later I get a warning stop start error.

 

So this morning I tested the new battery. First I brought it on a 30 min spin. Put the battery tester on, "fully charged". I put the radio on and the lights, "half charge" within 15 seconds. Put the heater on and straight away, "low battery".

 

I tested the alternator and it says charging on maximum.

 

Anyone got any ideas on what's going on? Surely a battery should hold charge for more than a couple of minutes. Is the new battery a dud?

 

Thanks for reading.

More likely something isn't turning off when it should - which usually suggests a CAN bus issue, I think you need to get a proper fault scan done and post it here.

Do a scan with the OBD? I didn't re code after I changed the battery which had been suggested too.

 

Thanks Dave

Your car is on the cusp on that change that required batteries to be coded into the system.

 

If you have a small QR code on your battery, then it is a smart battery and it needs to be coded in.  2016 onwards, VW group started putting in smart batteries (for Auto-Stop/start) and the batteries needed to be coded in to work properly.

Thanks for your help