Can abs fault cause multiple systems to fail?

[Ryrc]

Hi, sorry in advance this is going to be a long post.
Recently bought a 2010 Ds3 1.6 petrol, had a fault with the airbag light/pretensioner warning message which was temporarily fixed by replacing the sensor.
Now the abs warning light and esp light have both come and stayed on, tried erasing them from the system using a snap on scan tool which works but the codes come back straight away after ignition is turned on or after driving a few feet, found 1 code to start with C1320 - Front left wheel sensor Open circuit, short circuit to positive, short circuit to earth. Started with replacing the front left wheel sensor to no avail this did not fix the issue, next took a look at the magnetic encoder ring inside the bearing on the front left, could see it was damaged/worn, bought a new bearing and had a mechanic push the old bearing out and new one in, on inspection after leaving the garage i noticed that the c-clip seemed to be sat over the magnetic ring slightly, can the c-clip cause interference with the signal to the wheel sensor?? like an idiot i tried to move the c-clip and accidently jabbed the rubber ring inside the bearing, put it all back together to see if there was any difference (new bearing coming tomorrow to try that again) got about half a mile down the road before i had abs and esp light activate.
Later that evening i was driving it home and the dash lit up like a Christmas tree, esp light, abs, power steering fault, airbag light, speedometer not working, braking fault/STOP light, engine temperature warning.
Left it sit over night and then checked codes in the morning, i now have the following:

Engine management:
P15A6
15A0H/5536
P0501
P0366

Anti-lock brakes:
P0562
Codes for all wheel sensors

Electric Power Steering:
U1213

Instrument Panel:
0150

OBDll Codes:
P0343
P11A9
P11A8

If i shut off the ignition for around 5 mins or so and restart most of the time it will kind of reset itself so it's just the abs, esp and engine light on, until i drive further and the power steering etc starts to act up.

Used the scan tool to check the esp ecu supply voltage and it says it's around 12-12.1 volts so i assume that's right. After all that my question is essentially could the abs system be knocking on the other warning light i listed because i only had a couple of them before messing with the bearing and wheel sensor? any help on understanding the codes would be greatly appreciated, again sorry this is probably terribly explained, just don't know where else to look, new bearing and another wheel sensor (bought a cheap one on ebay originally) will be fitted tomorrow hopefully that does something to fix the abs etc issues

[Ryrc]

Applied the new sensor and bearing today, erased all codes. Abs and esp come on after moving, after about 20/25 minutes of driving around all the warning lights seem to come back on again apart from the temperature that seems to have fixed itself, at a loss where to even look for faults as something must be causing a knock on effect on the systems I assume it’s something to do with the abs module but any ideas would be greatly appreciated

[Jassooo]

Hi, in Peugeot and Citroen wheel speed is related to many systems. My fresh experience was last week from C4 ABS sensor that new aftermarket sensor was not working and when installed original all faults gone. Had gearbox fault, esp, abs faults example, when missing one wheel speed.

C-clip gap needs to be placed so that abs sensor head have space to be on top of the magnetic ring, if its completely wrong, then you cant basically install the sensor. And make sure that sensor is sitting flush at the space for it. I had to file the sensor plastic a bit to have it sit correctly.
If it has magnetic ring like I guess it has, the sensor is ”active”, abs ecu sends an signal to sensor right away when ignition is turned on and if not having correct feedback it sends the fault on dash right away even if you have moves at all, sensor needs to be working and installed correctly that it senses the small magnets from the bearing ring. Older type system it just counts the teeth when moving and then it goves the fault. New type sensor you cant measure. You can anyways measure the wires from abs unit to sensor connector with multimeter. Good luck.

[Huskyxantia]

My faults lead to breaks in the loom from the abs pump , that lit multiply dash lights its like the ecu knows they work with something else for example abs,traction control,esp and so on one has a fault then they can all light up , thats what happend to me last year, i replaced all abs sensors even got another abs pump then digging deeper the problem was 4 abs wires damaged on the abs pump loom , cost pennys to fix !

[Ryrc]

Thanks for the advice! It’s good to know something so simple can cause so many fault messages, I’m going to try and fit a new rear left speed sensor (oem part) tomorrow and hopefully that’ll do something! If not I guess it’s worth checking the actual pump, I’ve seen that the boards can be fried in the ecu for the abs but I would assume I’d have all the warning lights on as soon as I turn over the ignition but it’s very intermittent at the moment and yes you are correct it is the magnetic ring version Do I need any particular voltmeter if I end up going down that road? Like would a cheap one be okay?

[Huskyxantia]

Cheap voltmeters are ok they, are the rings ok ?

[Ryrc]

I’ve replaced the front left bearing as the ring is integrated into the bearing and the front right seemed alright also recently replaced all 4 disks and pads and I’m pretty sure the rings are on the disks for the back end? I could be wrong though

[Ryrc]

Replaced the rear left wheel sensor seemed to make no difference, just had a look at the connector to the abs Ecu and the inside was filled with water and mud so hopefully found the culprit, took it round the block and no lights so far but will take it for a longer drive later and over the next couple days to see if it comes back