Peugeot 508 ABS issue

[tomaskriv]

Hello

Father in law has 2015 Peugeot 508. Very clean example. But....a week ago it dropped few warnings. ABS, roll back, ESP....
Scanned with Lexia and here are results:
ECU
U1213
P050B

ABS
C1336
C1391

BSI
B173A00
B180562

I am not sure if all those codes related to curent fault. Thats what Ive found.
Had ABS speed sensor issue on my Grand Picasso about 5 years ago. It was broken abs sensor wire on rear axle. After replacing that all problems were fixed.
Could someone tell me is this looks like same problem? I will check sensor connectors for start. Maybe someone had similar problems/faults?


Thank you all.

[mickthemaverick]

It would be wise to reset those fault codes and then scan again to eliminate historic codes from your thinking. One of them in the BSi refers to driver's door memory for example!

[RichardW]

C1336 - Rear Right ABS sensor / C1391 Non acknowledgement of engine torque. P050B is a startup code, so seems a red herring.

So, RR sensor seems to be the place to start; I don't know if a 2015 508 uses the same design as the C4 Picasso, or a sensor with a wire attached. I've just replaced the OSR sensor on my 3008 for the same fault. Was OK when I stopped at work, then 90 mins later it was reported as dead as soon as I switched on, and never came back to life!

[tomaskriv]

Thanks for information.
Ive cleared all codes. Car was fine for about 10-20 meters. Then ABS light came back with ASR and roll back. Probably when car accelerated the faults were triggered again. Did not scanned after for other faults likr that one for drivers door.
I wonder if there is a way to test that ABS sensor?

[tomaskriv]

Some time passed.... onky now got some time to check wiring. Located where reat sensors connect to main loom under the rear seat. Checked ohms. On both rear I get 680. But only one way. I mean if I chenge multimeter probes on pins then I get nothing. Please correct me if I do something wrong.
One side of the sensor looked a bit worn. Like scratched from abs ring. I am not sure if they look like that new. But no cracks in plastic any other obvious damage.
IF sensor is alive, what else I can check before leaving for garage.....
Thank you all.