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Air pump S90-V90

posted by  david hunter on  Mon Sep 27 16:53 CST 2010
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last visit: Mon Jun 30 22:10 CST 2014
[RELATED]

When the air pump comes on at idle after warm up it is simply perfroming a programmed test by dumping fresh air into to the exhaust flow while the ECU looks for certains changes from the O2 sensors, if the test does not complete you will get a CEL with a fault code. The test will be performed during an extended idle time such as at a light, if it is cut short it will do later.

Are you getting a CEL Light and code?
--
David Hunter






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