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-   -   Question on BMW 3-Series E36 O2_Sensor (http://forums.pelicanparts.com/101-projects-discussion-forum-bmw-3-series/764713-question-bmw-3-series-e36-o2_sensor.html)

Tom (guest) 08-07-2013 05:34 AM
Hi,I have a 99 323i and can't seem to figure out why my engine light is still on. I have read the codes which are 1087 and 1088 and have replaced all four of the oxygen sensors. Still the check engine light stays on, any idea why?

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This post was auto-generated based upon a question asked on our tech article page here:

Nick at Pelican Parts 08-07-2013 05:34 AM
The codes are for slow response. I would check the intake and exhaust system for a leak. A leak can cause the oxygen sensors to react slowly.

- Nick


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