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Old 12-02-2013, 10:28 AM
SteveH SteveH is offline
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Join Date: Aug 2006
Location: Colo Springs
Posts: 1,280
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My '95 FZJ had P0420 for years - it would appear every 6 mo. and is triggered by driving at moderate speeds for a certain period of time. I turned off the light (every 6 mo.), as my gas mileage was good and the truck ran fine. You can dump a huge bucket of cash into converters and oxygen sensors trying to fix this - make sure it's a real problem first.
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Steve H.
Colo Springs, CO
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