AliBaba
BMW 7: Engine problems, jerking and smoke - What to do?
Loss of engine power
Jerking on acceleration
Check engine light on
(Translated from Dutch)
3 comment(s)
@AliBaba
Thanks. I have already been to a garage a few times because I smell burnt oil with the smoke and they said it could also be the rubbers on the cylinders melted. But after scanning, it didn't indicate an error code (this was before an error code appeared on my dashboard)
If you're smelling burnt oil, it could indeed be a sign of a more serious issue like worn or damaged piston rings, valve seals, or even a head gasket failure. These issues can cause oil to leak into the combustion chamber and burn, producing the smoke you're seeing. Given the complexity of these potential issues, I strongly recommend having a professional mechanic perform a compression test and a leak-down test. These tests will help identify if there's a problem with the engine's internal components. Please keep us updated on the situation. Do you have any other questions?
Best Answer
The error code P0430 indicates a problem with the catalytic converter's efficiency, which could be due to a faulty oxygen sensor, as your scan suggests. However, the symptoms you're experiencing such as jerking, loss of power, and smoke could also indicate other issues like fuel system problems or ignition system faults. I would recommend starting with the easiest check: replace the downstream oxygen sensor on bank 2. If the problem persists, you may need to inspect the catalytic converter, fuel injectors, and spark plugs. Please remember that these are just suggestions and it's always best to have a professional mechanic inspect your vehicle, especially when safety is a concern. After you've done these checks, could you please update us on the progress? Do you have any other questions?