The exhaust pressure sensor pipe gets blocked with soot causing a number of fault codes to occur with the Check Emissions warning appearing on the dash. Unblocking the pipe will fix a lot of these faults.
at last a video that shows nut and bolt locations of the pipe at the back of the engine,i think the only way to be sure the pipe is clean is to take it off.my next job,
Great video tried doing mine had a blockage put down dpf cleaning fluid only done part of the pipe used drill and wire still would not clear it so had to get the pipe of had blockage on the last bend the hardest part was working blind as alot of it you can't see and getting the air flow pipe back on took me about 3 hours and save me a few hundred quid
