They were trying to play sneaky with me by having the tuner clear the codes before I had a go. To be fair to the tuner he did mention it but he said it in such a way that it was like a $50 pound fix. When I started the car the errors immediately popped up. Instead of trusting the tuners quite I called the gtr guru and he said the pump is frigging expensive, not the quoted figure by the tuner. I was shocked to say the lest.