Yesterday, I was sitting in my Karoq (2021 1.5Tsi DSG) with the engine off and radio on.

Got a warning message, low battery, run engine.

Just about managed to start the engine, but left loads of warning messages with systems not available e.g. front assist, ESC, hill hold, stop-start etc.

Had the battery replaced this morning, but all the error messages are still there, and systems not working.

Technician scanned the car, but no error codes shown?

Any ideas on this one please?

Thanks.

Did the new battery come to you or did you drive to get it - inasmuch as after a battery change much of the strange stuff needs a a few hundred yards and even a bit of lock to lock?

Thanks for the reply.

I had it fitted at Halfords, and they did supposedly code it in.

But driving a distance and much wheel turning hasn't cleard the errors 🥵

I am going to see my local guy with Vagcom tomorrow to see if he can fix it.

Somebody was bound to chip in with "its the Halford effect" - this time it is me, sorry!

17 hours ago, rum4mo said:

Somebody was bound to chip in with "its the Halford effect" - this time it is me, sorry!

Absolutely, I'm not a fan of Halfords, but needed the battery quickly.

Anyway, things have progressed - of course, restoration of power and drving/turning steering whel should have reolved all these issues.

I visited our local guy with Vagcom, who's really switched on and he worked out that the ABS needs recalibration.

He tried a couple of times using Vagcom, but no success - apparently it requires Skoda/VAG on-line account access to resolve.

I've now booked it in with my local Skoda dealer in Watford for next Tuesday - in the meantime I have no assistance services including (but not limited to) ABS, Traction Control, Cruise Control (the list goes on & on!!)

Not good(obviously), this should not have happened if the battery change was being done correctly, or is this just another trap that can affect VW Group car ownership!

It seems that the low battery corrupted the ABS calibration?

Not seen that yet, other than your suggestion but the computer really do not like the battery to be in too lower state of charge for them, this can be before you get any warning messages and certainly well before you get any hesitation, let alone difficulty, of starting the engine and the light might still seem bright.

 

Just driving the car may not recover the battery enough charge to other than temporarily delay the return of the problem, what can often be needed is a recharge using an appropriate battery charger maintainer by following the instructions in the car's Owner's Manual and for charger.  Generally it's better to use a 2, 3 or 4-amp charger but to get the battery fully recharged will take longer and may need more than one session if you need to use the car.  Even if you have a new battery, 'coded' correctly, at some point in the future, not for a good while hopefully, it'd be best, when required, to do preventative charges with appropriate battery charger maintainer, following the instructions in the car's Owner's Manual, to prevent a repeat of the problem.  Just one example other units and providers are available. - Ring RSC900 4-amp "smart" charger maintainer. - https://shop.ringautomotive.com/rsc904-4a-smart-battery-charger-maintainer.html

 

Why has the battery only lasted 3 years (other than perhaps the very common premature replacement, instead of recharge) could there be again a fault in the VW battery management systems that requires an update/Recall (again) or is it your use of the car and battery, or an accidental drain (left something switched on, plugged in for too long whilst the car is parked up, engine off so alternator not running) or other drain on battery from a fault.

 

If the battery hadn't been 'coded' or 'coded' wrong your local guy with Vag-Com would/should have picked that up.

 

I think VW have made things more restrictive with what can be done without their scan tools, good revenue stream for them/their Dealerships.