c70 p1 1998 abs issues

[phillyc2003]

I have had a slight issue arise over the last 2 days .the abs motor has been kicking in radomley and some times when using brake i can feel it in action unecissary .it can last 5 mins driving or 15 mins then throw a tracs and abs light .just wandering what people thought as in direction of fault finding

[jamesy12345]

Might be the ABS ECU but see below...

https://www.midwest-abs.com/Troubleshooting.php

Worth getting the codes read if possible

[Wobbly Dave]

reluctor rings most likely.

[phillyc2003]

Reluctor ring on passenger side required a through clean . Cheers for advice guys