S20Workstation4
Well-Known Member
Hello All,
My 2010 Ford Expedition EL gave me a P0420 code (Cat Bank 1), about a month ago.
I did a WOT test, no problems there.
I did the mallet test, no signs of broken substrate in the converters (I tested both).
Not too long after, it gave me another confirmed code P0430 (Cat Bank 2). It now has 2 confirmed codes for both cats.
I did a temperature test, and both cats at running at 700 degrees Fahrenheit. This was checked after 30 Minutes of driving and then held at 2,000 RPM while checking the temperature.
I think I have done all the tests possible. Could it still be the cats, or could it be oxygen sensors? It seems odd that P0420 and P0430 would come up almost at the same time. I am at a loss here.
Note: Vehicle was sitting since July because of timing chain rattle, and was just put on the road about 1 month ago. Could the sitting/not driving have anything to do with these codes? Gasoline was stabilized correctly, so no contaminated fuel system.
Any help is appreciated.
-Joseph
My 2010 Ford Expedition EL gave me a P0420 code (Cat Bank 1), about a month ago.
I did a WOT test, no problems there.
I did the mallet test, no signs of broken substrate in the converters (I tested both).
Not too long after, it gave me another confirmed code P0430 (Cat Bank 2). It now has 2 confirmed codes for both cats.
I did a temperature test, and both cats at running at 700 degrees Fahrenheit. This was checked after 30 Minutes of driving and then held at 2,000 RPM while checking the temperature.
I think I have done all the tests possible. Could it still be the cats, or could it be oxygen sensors? It seems odd that P0420 and P0430 would come up almost at the same time. I am at a loss here.
Note: Vehicle was sitting since July because of timing chain rattle, and was just put on the road about 1 month ago. Could the sitting/not driving have anything to do with these codes? Gasoline was stabilized correctly, so no contaminated fuel system.
Any help is appreciated.
-Joseph
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