Hi, I have a 2010 Octavia 1.4 tsi estate. recently the battery keeps going flat when the car is not used for a couple of days.

I have had the battery tested and am told that it's state is good. I looked around the forum for answers (I'm not an electrician) and I have tried to test for amps with the earth lead on the battery disconnected. I'm not sure I was doing it right? I have disconnected my aftermarket radio to see if the radio was causing the drain, but the battery still goes flat. Where do I go now? any answers/ experts welcome.

 

Ron

Take the battery out (or disconnect it), fully charge it and leave it for a couple of days to see if it still loses charge with nothing connected to it to verify the battery is ok.

 

thanks I give it a try.

 

If it is the battery:

 

http://www.justcarbatteries.co.uk/s5008-bosch-silver-096-battery.html

 

Or identical battery:

 

http://www.justcarbatteries.co.uk/index.php/car-batteries/varta-car-batteries/varta-silver-dynamic-car-batteries/varta-silver-dynamic-096-battery-e44.html

 

I got the Bosch for my VRS CR and it's been great. The Varta is seemingly identical with Varta written on it. Fantastic price. Just check it will fit yours. I would assume battery trays are all the same.

 

Edited 2 April, 20179 yr by FatblokeVRS

Sorry, but if you have had the battery tested by a professional then imo it would be a waste of time taking it out and testing it again.

 

Who tested it, using what, and did they also test your alternator at the same time? The battery requires a good charge for them to test the alternator.

 

Have a look at your hazard light switch when it is dark (or inside garage) to see if it is lit whilst car is locked. Indication of a faulty control module.

the battery was tested by Halfords and an independent company. both gave the same answer. there is no light from the hazard switch.

56 minutes ago, Tilt said:

Sorry, but if you have had the battery tested by a professional then imo it would be a waste of time taking it out and testing it again.

 

Who tested it, using what, and did they also test your alternator at the same time? The battery requires a good charge for them to test the alternator.

 

Have a look at your hazard light switch when it is dark (or inside garage) to see if it is lit whilst car is locked. Indication of a faulty control module.

Are you sure thats correct?? Im not.

My hazard light flashes in the dark as do a lot of the fl cars with no issues at all.

Edited 2 April, 20179 yr by tubbytommy

Get a vcds scan done to see if you have any faults

 

faulty ignition switches are common or wires breaking between the car body and doors (both could cause battery drain)

Continuing the battery drain theme;  although I did a quick search, with a resulting suggestion that a low battery could be the problem, I am encountering a 'bonging sound' when the car has been stood for a few days and the door is opened.  I mentioned this at my last service and queried whether there could be a small current leakage from somewhere within the system. The response was negative and the suggestion was to bring the car in next time it occurs. But the journey charges the battery says I and hence no bonging to hear! Shoulders were sloped and no reassuring advice was offered.

Is this an indication of a potential battery decline?  The car is just 4 years old and done 26k whereas my previous 1.9pd car battery was going strong at the 9 year point.

51 minutes ago, Eddie-NL said:

Get a vcds scan done to see if you have any faults

where can I get this done main dealer??

thanks mike, I'll take a look.

how do I contact people as the links are not activated on this file?

 

The "bong" sound is a warning for low battery, also at that time you should read indication "low battery" on the audio's display.

Believe connecting a VCDS will tell you where the problem...

21 hours ago, tubbytommy said:

Are you sure thats correct?? Im not.

My hazard light flashes in the dark as do a lot of the fl cars with no issues at all.

 

21 hours ago, mikeholroyd said:

 

Sorry mate, you're wrong there. All BCM equipped cars (eg. FL Octy and Superb 2) have hazard switches which flash dimly when the car is locked. I asked about this when I first got my FL, thought there was something wrong, but there isn't.

 

It only flashes so dimly that it needs to be totally dark to notice it. Leave the car locked and have a look when it goes dark tonight. If the interior courtesy light is on, it will be too bright to see it flashing.

 

Mike

 

Cheers guys..........I did say "lit", though rather than flashing............

 

I am referring to what happened with my A4 a number of years ago. Battery drain - hazard switch remained constantly lit - proved to be convenience control module - faulty rear door controller.

 

It may well be different on the Skoda.........was just a suggestion, but as he says, there is no light from his switch anyway.

Hey

take a multimeter, select ampermeter. With the car locked from the key, disconnect the negative wire of the battery and put the ampermeter in series- 1 probe to the negative pole of the battery, the other probe to the wire you just disconnected. Any measurements above 10mA is too much and something is not sleeping as it should. Then you can take the same ampermeter and disconnect the fusses one by one an measure the current going through their sockets- this way you can pin point the electronics that is awake. Be careful you have to trick the car in thinking it is locked- force the door lock manually, same thing with the trunk lock.

 

 

With the same multimeter , select the voltage meter and measure with the engine running the charging function of the alternator - you should always measure a value above 13.5V