Ive got an 06 plate vivaro which I've had for 2 trouble free years.....but the last few days I've had trouble with it starting.

It takes a good 6-7 turns for it to fire up, then it will idle really low for 30 seconds with NO throttle response before the revs pick up & it's fine, then once it's been run for abit it will start no prob.

Plugged it in on a friends diagnostics & it states error code p1635_ob (Glow plug general fault).

I've checked on a few websites & forums and it seems like its a short circuit somewhere.

BUT I'm not convinced because surely if it was shorting out it would do it all the time?

Anyone experienced this because I'm wondering if it simply needs glow plugs?

Thanks.