if it has the two valves at the back of the pump then it's the hp2 system. there was an article in the blue print magazine about it explaining that the valves are controlled by the ecu through a timed opening and not a pwm these valves stick and the fault codes are p1229 p0093 p0627 i had pictures to post but they would't upload i used to be able to do this but now when i press the upload picture to post nothing happens? anybody knows why?