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check engine code po422 850

posted by  KlausC on  Tue Jun 11 14:12 CST 2013
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

A P0422 is an indication that the rear O2 sensor finds the exhaust dirty. If your MPG is low, suspect another vacuum leak like the hose from the air filter to the throttle body.

Because this is a replacement CAT and probably not OEM, consider getting a stand-off adapter for the rear sensor. This backs out the O2 sensor from the mainstream flow and reduces error messages, used for high flow exhaust systems.





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