S90 Multiple Errors

acs9086 · Mar 16th, 2023, 11:39

Hi all, hoping someone can give me some guidance?!

I have a 2018 S90 - Recently had 2 error codes pop up - Auto hold service required / Parking brake service required.

Brought it to get checked out - OBDS2 showing as an issue with the passenger side rear brake system - low voltage.

Had the brake pads changed out - The brakes could not be put into service mode, so were wound out manually. Once these were changed, the computer was still showing faults - Mechanic said that the caliper may need changing. Once I drove out of garage, more faults appeared and bleeping noise started to do with the electric parking brake.

I ordered a used caliper, had it fitted, and even more errors now appearing (along with the original parking brake/auto hold errors) - ESC temporarily unavailable, SRS airbag warning, city safety reduced functionality

Has anyone ever experienced anything similar? If so, how did you get it sorted?

nu11eaf · Mar 16th, 2023, 11:55

Auto hold and parking brake fault is a common issue, I had this, it required a visit to main dealer and was sorted out very quickly with a software update.

MCV60 · Mar 16th, 2023, 19:52

Auto hold / parking brake issue could be linked to a wire loom fault. Replaced FOC if in warranty.

neilgorin · Mar 16th, 2023, 20:27

Low voltage could well really mean "dirty contact". The area is lashed with water and road dirt after all.

acs9086 · Mar 17th, 2023, 07:01

@MCV60 Unfortunately out of warranty.

Would it also be possible if, when the caliper was changed, not calibrating the brakes would throw these errors up? From what I've seen, this requires certain apparatus / software for this change

Mar 16th, 2023, 11:39	#1
acs9086 New Member Last Online: Apr 17th, 2023 16:47 Join Date: Mar 2023 Location: Co. Down	S90 Multiple Errors Hi all, hoping someone can give me some guidance?! I have a 2018 S90 - Recently had 2 error codes pop up - Auto hold service required / Parking brake service required. Brought it to get checked out - OBDS2 showing as an issue with the passenger side rear brake system - low voltage. Had the brake pads changed out - The brakes could not be put into service mode, so were wound out manually. Once these were changed, the computer was still showing faults - Mechanic said that the caliper may need changing. Once I drove out of garage, more faults appeared and bleeping noise started to do with the electric parking brake. I ordered a used caliper, had it fitted, and even more errors now appearing (along with the original parking brake/auto hold errors) - ESC temporarily unavailable, SRS airbag warning, city safety reduced functionality Has anyone ever experienced anything similar? If so, how did you get it sorted?

Mar 16th, 2023, 11:55	#2
nu11eaf Premier Member Last Online: Today 00:27 Join Date: Mar 2013 Location: Yorkshire man living in County Durham	Auto hold and parking brake fault is a common issue, I had this, it required a visit to main dealer and was sorted out very quickly with a software update. __________________ XC90 Inscription D5 Power pulse, 2017 MY, Savile grey, Blond Nappa, Leather dash/door tops, Walnut inlays, Dark tinted windows, Air suspension, Bliss/Cross traffic alert, Xenium/7 seat comfort/Family/Winter packs, 4 zone climate, Heated rear seats.

Mar 16th, 2023, 19:52	#3
MCV60 Master Member Last Online: Yesterday 13:18 Join Date: Oct 2013 Location: .	Auto hold / parking brake issue could be linked to a wire loom fault. Replaced FOC if in warranty. __________________ 2021 B4 V90 RDesign

Mar 16th, 2023, 20:27	#4
neilgorin Senior Member Last Online: Yesterday 22:37 Join Date: Apr 2019 Location: North Berwick	Low voltage could well really mean "dirty contact". The area is lashed with water and road dirt after all. __________________ 2023 V60 B3 Core with Blonde Leather. Before: 2019 V60 D4 Inscription Manual ran to 105k miles. 2015 V70 D3 5 Cyl ran to 93k. 2010 V50 1.6D DrivE ran to 87k, bit fragile.

Mar 17th, 2023, 07:01	#5
acs9086 New Member Last Online: Apr 17th, 2023 16:47 Join Date: Mar 2023 Location: Co. Down	@MCV60 Unfortunately out of warranty. Would it also be possible if, when the caliper was changed, not calibrating the brakes would throw these errors up? From what I've seen, this requires certain apparatus / software for this change

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