Thread: Fault code P2263-22: Turbo System

Revival,. Got this twice today on cruise control at 110ks.. wish me luck.. Advice welcomed

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There's the official list from Topix

Hey guys, I'm seeing the same issue as in this post. A lot has been said about vacuum lines for secondary turbo but I'm trying to understand how this will contribute? My symptoms are at cruising speed only, no load. DTC P2263-22 only. Freeze values always indicate RPM below 2500 meaning the secondary turbo is not in play. If there is a vacuum leak how will it cause this issue under 2500RPM then? Any advise welcome.
Thanks!

Originally Posted by Anton

Hey guys, I'm seeing the same issue as in this post. A lot has been said about vacuum lines for secondary turbo but I'm trying to understand how this will contribute? My symptoms are at cruising speed only, no load. DTC P2263-22 only. Freeze values always indicate RPM below 2500 meaning the secondary turbo is not in play. If there is a vacuum leak how will it cause this issue under 2500RPM then? Any advise welcome.
Thanks!

Because the primary turbo is also controlled by a vacuum assisted solenoid. On the SDV6 there are two solenoids, one per turbo.

Originally Posted by Anton

A lot has been said about vacuum lines for secondary turbo but I'm trying to understand how this will contribute?....

No! This was not about vacuum lines to the secondary turbo. It was about vacuum lines to the engine mounts (though every thing is interconnected) and all I can say is the issue has not arisen again after the engine mount vacuum lines were capped. This is after 50,000k of travel with and without towing.

The vacuum leak was directly at the engine mounts, not associated with the vacuum hose lines as such. The hose receiver fittings on the engine mount had deteriorated to the point where they would no longer seal when a vacuum hose was pressed into it.

You could temporarily disconnect the engine mount vacuum hoses yourself, seal the vacuum hoses and test what happens. Easily done and if those vacuum hoses are well sealed it has no effect on turbo or engine performance.

If that is the problem you can change the engine mounts or just continue to run with the engine mount vac lines sealed. Very little difference that I can detect.

Originally Posted by Ferret

No! This was not about vacuum lines to the secondary turbo. It was about vacuum lines to the engine mounts (though every thing is interconnected) and all I can say is the issue has not arisen again after the engine mount vacuum lines were capped. This is after 50,000k of travel with and without towing.

The vacuum leak was directly at the engine mounts, not associated with the vacuum hose lines as such. The hose receiver fittings on the engine mount had deteriorated to the point where they would no longer seal when a vacuum hose was pressed into it.

You could temporarily disconnect the engine mount vacuum hoses yourself, seal the vacuum hoses and test what happens. Easily done and if those vacuum hoses are well sealed it has no effect on turbo or engine performance.

If that is the problem you can change the engine mounts or just continue to run with the engine mount vac lines sealed. Very little difference that I can detect.

Right, was not clear from revival post. If engine mounts, then you can csp off, but most likely the mounts are shagged and you risk more NVH and misalignment of engine and transmission assembly putting more stress on transfer case, prop shaft uni joints and the like. I had both mounts replaced at 220000km, made a difference as far as I could tell and piece of mind, and no error codes.

Originally Posted by Eric SDV6SE

... but most likely the mounts are shagged and you risk more NVH and misalignment of engine and transmission assembly putting more stress on transfer case, prop shaft uni joints and the like. I had both mounts replaced at 220000km, made a difference as far as I could tell and piece of mind, and no error codes.

If the mounts are shagged then I agree but neither AutoCode or Dover have said the mounts need changing despite asking them to check them during service inspections, one of which was only 2 days ago. The problem first arose at only 120,000k. Now have 175,000k. Probably would be shagged at 220,000k. It's something I will change in the future, nothing lasts forever.

I don’t know if it relevant to the D4 but I got a similar error message on my D3 due to the vanes within the turbo sticking. Moving the boost pressure actuator back and forth with a piece of wire frees up the vanes. Originally happened at the beginning of 2019. I periodically free the vanes and still going strong.
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