Question about 2006 Chrysler Pacifica
Malfunction indicator light is on, and code P 0420 is shown
There are numerous things that can cause this code to come up.First how many miles do u have? U have to make sure there are no exhaust leaks by the down stream O2 sensor. Also have to make sure there are no fuel delivery problems or vacum leaks. If u have access to a scanner for your vehicle u will have to look at your fuel trims and make sure they are around 0% at idle and off idle. Also have to make sure your O2 sensors are working correctly. Post some more info for your vehicle and i can guide u in the right direction
Posted on Jan 10, 2013
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Posted on Jan 02, 2017
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