1.5 DCI Limp mode

[MCCARROLL_FORCE]

Hello all,
Hoping somebody can help me with the below as I'm pulling my hair out at this point!

My 12 plate 1.5 DCI J10's Air intake pipe split about a week ago I was on the motorway at the time and noticed the car was rapidly losing power and slowing down. I got off at the next junction close to my home and managed to limp it back I bought a replacement intake and fitted it however I now can't get the car above 1500rpm even after resetting the fault codes. I dropped it off at a Wilco Motorsave garage to be worked on they replaced the EGR DPF and a turbo solonoid? Having done that the only code they are still getting is ASCD fault but the mechanic has now given up on it & suggests it may need a main dealer. Please can anyone shed some light on this or point me in the right direction.

Below is the list of codes I had before the mechanic carried out the repairs.

P012C (Inlet pressure)
P242F (DPF)
P0299 (turbo underboost)
P047B (exhaust pressure B)
P0471 (exhaust pressure)

P1525 ASCD Air bypass valve/Auto speed control device

They have checked the brake lights work (ASCD pedal switch).

[gloucester]

Welcome to this forum.

I see you've also been discussing this at https://www.qashqaiforums.co.uk/viewtopic.php?f=18&t=2441

I can't add anything I'm afraid.