ABS problem 406 V6 saloon MY97

No ABS light on firing it up or at any time.

ABS works fine for the first five minutes or so after starting the engine.

After that until the engine is restarted basically the ABS does not work and
the wheels lock up. Turning the engine off then on and it works again.

Wonder if someone has disconnected an ABS light?

Any info on reading ABS fault codes?

I found the fault code list, but no way of reading the fault codes.

Originally I thought it was a sensor problem (since it appeared
intermittent), so removed/checked/cleaned etc all to no avail. Only tonight
realised that it seems time based from starting the engine and then fails
until the engine is restarted.

I would really imagine there should be an ABS light given that it becomes
unoperational.

Thanks,

John Banks

 

Error was 6910 ring gear wrong number of teeth, but the Bosch list of codes
could not determine which wheel this was. I was advised that two different
brands of tyre on the same axle could cause the problem - they were worn so
I changed them, but no improvement.

A Citroen diagnostics machine plugged in gave 0910 as the error which is
incoherent sensor signals.

Next step is to get 4 channel scope on it whilst driving. It seems that it
is speed related, as soon as you go over say 60 mph once the ABS doesn't
work again until the engine is restarted.

Tyre size is 205/55R16, OEM size is 205/60R15, but this is a Peugeot
accessory wheel and the rolling circumference should be the same.

 

Sorted with the correct driveshaft. ABS bulb put back in