Quote:
Originally Posted by Yozh
4530 is a fairly broad code that will cover anything from boost leaks, intake restrictions, exhaust leaks and exhaust restrictions. One thing to keep in mind here - having this SES will prevent DPF regeneration. Which in turn will exacerbate the problem further. If you happen to have proper BMW diagnostic tools, I would try to force the regeneration of the DPF.
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Yozh - I read the very same ISTA notes for 4530.
In my case, code (and SES light) came up once - after starting (X5d) since 1 month being parked.
As of now it shows up in the history only (no SES) as not present/inactive.
Car has 100,000mi, I am original owner, engine-side everything is stock except new thermostat, addition of Provent 200 on CCV and swirl flap delete. EGR valve appears to be clean (no immediate reason to suspect CBU)
Questions:
1) do you or anyone else knows if
inactive 4530 will prevent DPF regenerations?
2) should I consider any related maintenance or wait for problems to appear?
3) if yes on maintenance, should the order be as follows:
- vacuum lines
- vacuum pump (it sips tiny bit of oil)
- CCV & (red) boost hoses
?