DS3 multiple faults after battery replacement

[atom]

Hi, recently replaced the battery on my 2015 DS3.

Car was running fine before the battery change (it failed to start 10 days ago and figure it was the original battery), no fault codes, no warning lamps etc.
However since replacing it I get three warning messages on the centre console:
- Tyre Pressure Not monitored (comes on even before starting engine)
- Power Steering Faulty
- ESP/ASR System Faulty
The biggest concern is that the power steering is not active at all as it makes it almost undrivable at low speeds.

I've tried the following:
- Reset tyre pressure sensors in car
- Disconnected & Reconnected battery (leaving 30 mins for systems to drain power)
- Check power steering fluid level.
- Drive for 30 mins at motorway speed.
- Checked the most obvious labelled fuses in engine bay on wiring diagrams.
- Did full left & right lock on steering to try to calibrate the range of turning.
- Left for a few days in the hope it would clear any gremlins
- Checked fault codes with an ODB reader (non found)

My next idea is to charge the old battery overnight and see if reverting to the old battery fixes it, but after that I'm all out of ideas. Has anyone else got any suggestions? or should I just give up and take it to a garage to get checked over? I feel like it's going to be something stupidly simple and would rather not get charged £100 for a mechanic to say the obvious.

[mickthemaverick]

After replacing the battery you should carry out a full BSI reset according to the procedure in the link below. Try that and see how you get on.

viewtopic.php?p=601679#p601679

[atom]

Thanks, I did try that the other day, and I've just tried it again now and behaviour is the same, Guessing that means there's something physically wrong then? (damaged wire etc)

[mickthemaverick]

The next move is to have a high end diagnostic scan. What have you used to determine there are no fault codes?

[atom]

Was just one of those cheap ODB2 readers off of Amazon, It probably misses a whole bunch of stuff that proper equipment would detect, but it's all I have lying round before a professional looks at it.
I'm going to charge the old battery up and test if that resolves anything first, as I did see other comments about the power steering module being very sensitive to voltage, so maybe the new battery isn't quite up to scratch or something

[Paul-R]

Where in Wales are you? You may find a forum member near to you and available offering their diagnostic machine.

viewtopic.php?p=509922#p509922

[PaulC5]

If you suspect the battery have you checked its voltage ? Should be about 12.7 volts if fully charged before the first start of the day and with the engine running about 14.4 volts unless it has a smart alternator when it could be less.

[Mihael_M]

"I'm going to charge the old battery up and test if that resolves anything first " .
Best to try that first. Since there are two types of batteries AGN and EFG, it is possible that if the same type is not taken, it must be changed in the settings with the diagbox. But in that case, those errors that you have do not appear.

[atom]

Where in Wales are you? You may find a forum member near to you and available offering their diagnostic machine.

viewtopic.php?p=509922#p509922

I'm in North Wales, not too far from Chester.

If you suspect the battery have you checked its voltage ? Should be about 12.7 volts if fully charged before the first start of the day and with the engine running about 14.4 volts unless it has a smart alternator when it could be less.

I don't have a multi-meter I'm afraid, not a proper owner am I ? . I don't believe there's a major problem with the new battery, I was suffering from poorer MPG (on board computer) with the old one, and now it's improved by about 5mpg (as well as a few other signs that in hindsight should've been obvious it was failing). I'm guessing the old battery was constantly placing max load on the alternator and the new one being mostly charged places less load on it.
Admittedly that's not a good indication about voltage levels etc but seems a good sign that the new one isn't reconditioned or anything

"I'm going to charge the old battery up and test if that resolves anything first " .
Best to try that first. Since there are two types of batteries AGN and EFG, it is possible that if the same type is not taken, it must be changed in the settings with the diagbox. But in that case, those errors that you have do not appear.

I did try charging the old battery, but it's clearly dead as a doorstop, after 12 hours on charge it couldn't even turn the engine once, so there is no way of knowing if it would've cleared the faults. It didn't manage to clear the pre-start tyre pressure warning so I've got a feeling it wouldn't have fixed anything.
Is there any way to tell which type of battery is which? neither old (9675240480) nor new (44477012A) appear to mention which is which, I was under the impression that as I don't have stop-start that it didn't matter which was fitted, and that "the cheapest" was all I needed.


Thanks for all the help/advice offered everyone, seems there is some deep rooted electrical/mechanical problem, and not something I've not missed something stupidly obvious. If anyone has any further suggestions feel free to offer them. Otherwise when I get an actual diagnosis(hopefully some time this week) I'll update this thread with what the problem is/was

[Mihael_M]

Probably your car doesn't use AGM or EFB so it needs a standard battery like the one inside 12V 64Ah 600A. Although it is not clear to me which new one you put in since that number 44477012A says that it is a weaker battery than what was inside. But it should work normally with that as well. In addition, when replacing the battery, sometimes it happens that various errors are displayed that can mostly be deleted with the appropriate device. It should work with that universal one of yours. But if it won't then LEXIA 3 with diagbox program must be used. I assume that the battery replacement went normally without breaking any cables.

[atom]

To update anyone with a similar issue. Turns out there was a broken wire, which had caused a "main fuse" to blow, so no amount of resetting the ECU would fix it. Mechanic didn't say where the broken wire was so can't tell if replacing the battery caused it to break or if it was just unlucky timing.