P420, Manifold/Cat Converter - any effects?
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Junior Member
Joined: Mar 2010
Posts: 12
P420, Manifold/Cat Converter - any effects?
2000 civic dx, 220K miles.
Serivce Engine light on , only code is P420. Manifold/Cat Converter.
Questions:
1) Does this condition cause any problems, like rough idle?
2) Can I do any damage if I ignore it?
Serivce Engine light on , only code is P420. Manifold/Cat Converter.
Questions:
1) Does this condition cause any problems, like rough idle?
2) Can I do any damage if I ignore it?
Recognized HCF Member
Joined: Sep 2007
Posts: 9,453
From: Houston, Texas
P0420 tells you that the cat converter is dead or that there is an exhaust leak. There should be no performance problems, unless the cat is clogged and restricting the release of exhaust gas from the engine. This would generally manifest as power loss.
In some states, a CEL or bad cat will cause you to fail an emissions test.
In some states, a CEL or bad cat will cause you to fail an emissions test.
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