INT MAN RUNNER B2 LOWER LIMIT NOT REACHED fault code..... So, according to the Independent garage, to fix this tiny fault costs Â£1200 in parts plus one or two hours labour. Searching the web finds lots of people ignoring the problem and continuing to drive around. Others say why can't you just replace the runner motor(s) rather than the whole manifold? Can't find anyone who has just replaced the motors and that definitely fixed it. Anyone got any actual fixes for as least money as possible? Any advice gratefully received!!