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Old 10-09-2017, 04:29 PM   #11
particlewave
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Join Date: Mar 2012
Location: Ft. Leonard Wood
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My point was that the air pump could be working with those codes because there is no mechanism to tell the DME if the air pump is working or not.

The codes are caused by an incorrect voltage reading at the pre-cat O2 sensors during SAI cycle. The cause of that is insufficient airflow from the SAI, which could be air pump, changeover valves, vacuum or clogged ports.

Happy hunting!
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