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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > 2008 128i Eccentric Shaft Sensor Issues



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      01-14-2020, 06:00 PM   #1
Moosieth
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Angry 2008 128i Eccentric Shaft Sensor Issues

Hello everyone.

Recently, my '08 128i threw code P1017, for a faulty eccentric shaft sensor. So, that needs to be replaced.

However, recently, the SES light turned off for a brief moment (15 min maybe) and the re-illuminated. I went home to check the codes to see if anything had changed, and I was met with disappointment.

Now, not only do I still have P1017, but i now have P2096, for post-cat fuel trim being too low. I JUST replaced my valve cover gasket maybe 6 months ago in order to fix that exact same code. Could the two codes be related, or do I need to resolve another issue (again).

Thanks.
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      01-14-2020, 06:07 PM   #2
Moosieth
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My plan is to fix the ESS, make sure to do the valve cover gasket correctly, and then see if the lean mixture persists
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      01-14-2020, 08:36 PM   #3
E92William
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Should have done the eccentric shaft sensor with the cover although it's understandable you didn't as it's not cheap. I didn't either when replacing my cover either. The fuel trim code could be related to how its running without valvetronic so I wouldn't prioritize that.
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