Hi All,

Looking for abit of advice, I put my footdown the other day and experienced a restricted performance scenario. My friend came straight to me plugged in the snap on diagnostics and it only produced a p1247 code.

Anyway turned the car back on and problem gone. Hasn't happened since and have had the machine left with me for 2 weeks so I could check and not a single issue of restricted or accompanying error code. However I do get a boost noise up until I believe turbo B kicks in circa 2500rpm and then the boost leak noise stops.

Can someone point me in the right direction as I can't find any faults matching mine?

That’s a low boost pressure code, might be a leaking boost hose or even a cracked inlet manifold..

Hi mate,

I thought that at first about the inlet but it didn't throw any map sensor faults or any other accompanying fault codes only the P1247. but the fact that the boost leak noise stops after 2500rpm would mean that it's not a leaking inlet as the noise stops when it switches to turbo B. It is related to a hose on turbo A? How do I go about looking at these hoses on turbo A?

Any guides that show the way to get to the first turbo to check?

Local independent can't get it in until the 16th. He suggested it could be a egr pipe. Any way I can verify? Like I mentioned before, the whistling shuts off at 2500rpm so is isolated too turbo A.