Hi

For about 6 months now my engine management light has been coming on and off (but never on when its at the garage!) and when this happens my idling revs become irregular as if my DPF is trying to regen

A while back, when it went in for an MOT, it came back on straight after so I took it back and they said the dpf pressure pipe had come off so they put it back on, all is fine.

The light has come on again but I don't know where to look for the pipe to see if its come loose again - can anyone help?

Thanks

AFAIK The pipes come up to the exhaust pressure sensor on top of the engine, so you should be able to trace them back from there