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Service Engine Soon-10720 & 10721

Hello,

I have a 2010 328ix (N51 engine) and i have a Service Engine Soon light. I scanned the car using INPA software and got the following codes -10720 & 10721. What could my issue be?





Last edited by Netspec; 03-27-2017 at 08:33 AM.. Reason: added images
Old 03-26-2017, 04:25 PM
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Possible faulty o2 sensor - I've attached a DIY tech article with the fix below. Let us know if you have any questions.

BMW E90 Oxygen Sensor Replacement | E91, E92, E93 | Pelican Parts DIY Maintenance Article


-Dmitry
Old 03-27-2017, 12:36 PM
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Possible faulty o2 sensor - I've attached a DIY tech article with the fix below. Let us know if you have any questions.

BMW E90 Oxygen Sensor Replacement | E91, E92, E93 | Pelican Parts DIY Maintenance Article

-Dmitry
Thanks for your response. It's also burning oil
Old 03-27-2017, 02:08 PM
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Dmitry,

Thanks for your prompt reply. I should also mention that I'm burning oil and experiencing rough starts after short trips
Old 03-27-2017, 02:42 PM
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Quote:
Originally Posted by Netspec View Post
Dmitry,

Thanks for your prompt reply. I should also mention that I'm burning oil and experiencing rough starts after short trips
No problem at all, glad to help - did the car throw any other codes other than the ones you mentioned above? Any white smoke coming out of the exhaust? How much oil is it burning and is there a leak? Maybe a blow head gasket?


-Dmitry
Old 03-28-2017, 12:44 PM
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No problem at all, glad to help - did the car throw any other codes other than the ones you mentioned above? Any white smoke coming out of the exhaust? How much oil is it burning and is there a leak? Maybe a blow head gasket?


-Dmitry
Code P0171 but no white smoke out of exhaust. No leaks I can see but I noticed oil level dropped after 150 mile trip at speeds up to 80 MPH.
Old 03-28-2017, 05:21 PM
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Quote:
Originally Posted by Netspec View Post
Code P0171 but no white smoke out of exhaust. No leaks I can see but I noticed oil level dropped after 150 mile trip at speeds up to 80 MPH.

Post a Comment under the DIY tech article that I linked you to - our master tech should be able to give you some details and what to look at first (much more knowledgeable than I am )


-Dmitry
Old 03-29-2017, 02:26 PM
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