Ryancope123

Hi Guys, Firstly i would like to introduce myself, been hovering around the forum for over a year now and thought i best create an account. I have a 57 plate 320D Coupe (Dredded N47), had a lot of issues in the 1 year of ownership, camchain replacement / thermostats etc... very unlucky ! I have just had all the glow plugs replaced and the controller unit also as the car was not performing a DPF regen, and i would greatly appreciate it if somebody with some know how can help me out :) Below are some error codes that have popped up, I took the car for a 100 mile trip on the motorway today to see if it would regenerate and it didn't appear to regenerate however it did go upto 550 degrees for a short period of time minutes ( i hit a round about :( ) I have been back out tonight for another 60 mile trip to try and get it to get over 300 degrees but no luck :( Are the below codes affecting the regeneration and would you mind helping me solve Fault: Charge air temperature sensor - Code: 4391 Fault: Particle filter system - Code: 452A Fault: Charge air temperature sensor - Code: 4390 Fault: Layer Generator Code: 4A07 Fault: :Oil Pressure Switch Oil Pressure status implausible engine operating condition - Code: 4CA0 Im guessing sensor ones are referring to the "boost pressure sensor", would somebody be able to provide a picture of where this is located please. I have just brought some MAF sensor cleaner to try and clean it out. In addition to the above, the car is hesitant and a little "sluggish" at very low RPM, could this be related to the sensor throwing duff information, a picture of all easy to clean sensors would be appreciate ? i can then clean them all. I really really appreciate the help guys, so far the last year of ownership has cost me £4k... ive had all sorts go wrong, so hoping for a bit of luck ! Coolant temperate is operating at 88-91 degrees, which apparently is normal according to other posts, I can run other metrics as well if necessary, exhaust temperate is 310 degrees @ 70MPH. DPF backpressure is coming at at 1000 hpa ( i have just purchased Forte DPF cleaner) and will monitor over the next week to get this figure down, could this be the issue? Thank you for your time, i appreciate it.