2010 E70 X5 3.0d - Intermittent No Boost

Sm[]key · Post by **Sm[]key** » Fri Apr 28, 2023 7:30 pm

Clocking a lot of miles weekly.

Every now and again, usually after when cruise control has been set for speed camera zones I accelerate and no boost kicks in.

This corrects its self after a few miles?

Current Error Codes:

4667 Particle Filter System
452A Info - Particle Filter System
4501 Exhaust gas circulation control deviation
4507 Exhaust gas circulation control deviation
3F40 Rail Pressure Senor offset test
4222 Cylinder 2 control

X5Sport · Post by **X5Sport** » Fri Apr 28, 2023 7:43 pm

Has it had the swirl flaps removed? Several reports that 4667 is the DPF regen happening too frequently and 452A that the DPF is end-of-life. Both can be caused by swirl flap deletion but only show up many thousand of miles later.

Sm[]key · Post by **Sm[]key** » Fri Apr 28, 2023 7:53 pm

Swirl Flaps still there.

I also have a blue tooth OBD, if I reset all the error codes the boost comes back.

Leslie · Post by **Leslie** » Fri Apr 28, 2023 10:21 pm

The Dpf end of life wont cause any running issues as long as the dp isf still working its just an annoying warning that appears after 10 mins . Can you run a smooth running test as it sounds like injector 2 is having trouble but I think the egr can cause problems if its stuck open too.

X5Sport · Post by **X5Sport** » Sat Apr 29, 2023 7:30 am

That one root cause eliminated then. As above, injector two not happy and the EGR with it.

Sm[]key · Post by **Sm[]key** » Tue Jun 18, 2024 4:32 pm

This was a 4507 fault for anyone interested.

Clear fault and turbo returns

Still not sorted.

Leslie · Post by **Leslie** » Thu Jun 20, 2024 2:13 pm

The egr coolers have a habit of leaking plus there is a return spring underneath that breaks from what I've heard and will stop it closing properly so id check for that , it sounds like the egr isn't closing causing no power .

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