Multiple warning lights

[Impact Pete]

I started up the van and strangely 3 warning lights are on, abs airbag and anti skid, as I drove off the airbag light went off for a few seconds but all 3 permanently on.
Read the code's which say;
ABS
U0401:68-8B data received from ECM (engine control module)/(powertrain control module) A is invalid

C0039:38-C8 RR Tone wheel

RCM restraint control module
U0401:00-8B data received from ECM (engine control module)/(powertrain control module) A is invalid

Any ideas where to look first?

[Frag]

The ABS tone ring has likely cracked on the right rear hub.
Jack up that wheel,then look from rear of van at centre of disc,axle side.
Turn the wheel while checking the abs tone ring
It will probly have cracked with the resulting larger gap between ridges,or may even be loose and spinning free on the hub itself.

[Impact Pete]

The ABS tone ring has likely cracked on the right rear hub.
Jack up that wheel,then look from rear of van at centre of disc,axle side.
Turn the wheel while checking the abs tone ring
It will probly have cracked with the resulting larger gap between ridges,or may even be loose and spinning free on the hub itself.

Thank you, will have a look tomorrow, I cleared the code's earlier to see what might trigger it, did about 2 miles with braking it all came back on when I was doing a steady 40mph

[Impact Pete]

Struggling to see any obvious damage to the Tone ring, the abs and airbag light seem to now come and go whilst driving but anti skid light stays on.
Looks like a garage job

[Airthies]

Check the two earth points on the left inner wing down below the fuse box.
One for ABS and general circuits, one for SRS (safety restraint system= air bags)

Seng frod gay Armor 8 Prolapse pulsing Crapatalk

[Impact Pete]

Check the two earth points on the left inner wing down below the fuse box.
One for ABS and general circuits, one for SRS (safety restraint system= air bags)

Hi thanks for the advice I will have a look there too, can it really be as simple as that? Might explain the fluctuations in light's coming on and off