Had an engine warning light come on and I've been given the above fault code from SEAT dealer on my '09 Exeo 143 TDi Sport after they've run a diagnostic.

Any ideas anyone?

It's described as passive/sporadic and symptom is 4875 and didn't come on the first run after the dealer cleared it. Came on again on the next engine start. I dont even know what Cooland Pump B is? Car is running OK, fule consumption and performance both as before error light came on. Dealer says will need more investigation as they don't know what it is straight off and it'll be at my expense.