Posted by stuart white on February 22, 2006, 5:32 pm, in reply to "Re: bmw 330D 1999"
The difficulty in diagnoising the fault is that the pump is quite capable of producing the pressure, but the system cant seem to control the pressure. The reg is working as the duty cycle goes up and down with the pressure. We think the fault is with the pressure sensor giving inaccurate information so we are going to replace it tomorrow.