Hi all
van is starting to play up but not all the time when starting here are the symptons

glow plug coil carries on flashing for 30 seconds after starting and some times when you shut the engine off it will carry on running for 5 seconds then stop

when it carries on running after ignition is switched of it will then struggle to start again but it will start this is a intermediate fault

no smoke from rear of van when bad starting

code reading u1601 can line error wiring fauly bus off

has any one got some information on changing the glow plugs on these vans as they look pretty hard to get to at the back of the engine

is this a ecu communication error
is this a glow plug relay fault
is this faulty glow plugs fault

any help would be appreciated

regards

Richard