Wh stato wont start when it starts displays abs off an check engine

[Pestah bro]

Hey just got a l67 wh statesman.
Misses was at the shops tried to start the car sounded like it was struggling then it finally started an check engine an trac off came up stayed on the hole drive. Got home she turned it off i started it again an they didnt light up again. Second time its done it. Recently changed plugs leads belts. New head unit with iso harness an sub with amp installed professionally with fuses an relays.
Any ideas? Im thinking battery hasnt got enough cold crank amps an is tripping up the abs

 

[EYY]

Could be the abs module, it's a common problem. Of course if your battery is on the way out that will always make electronics do funny things.

 

[mpower]

regulator, battery, abs module in that order.

you can test for all 3.

 

[Pestah bro]

Took it to get a scan it came up with crank angle sensor. So ill be changing that this weekend.