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Old 09-12-2012, 06:07 PM   #1 (permalink)
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Default P0430 and P0431

2003 Civic LX bone stock

When it is cold the car runs like crap and falls on its face then picks back up. I get CEL for P0430 and P0431 all pointing to the catalytic converter. But my experience with Honda's I've never had an issue with a cat on a civic with only 130k. I don't mind replacing the cat or o2 sensors. I have read that the cat can become clogged from a misfire engine. Never got a CEL for misfire or low voltage on o2. In the past I have had issues on a different civic misfiring bc of the distributor. Anyone have any related issue? I plan to check to make sure no major damage. After that possibly replace exhaust manifold/cat?


Any advice would help....

Thanks.
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Old 09-13-2012, 07:45 PM   #2 (permalink)
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Before replacing the cat I'd check the o2 ans see if they are working and see whale your car is running.. Or if the o2 are lazy then I'd switch them first and then check it again.. Your cat should be good since you've had no problems with your car
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Old 09-20-2012, 06:03 AM   #3 (permalink)
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Quote:
Originally Posted by boosted ef9 View Post
Before replacing the cat I'd check the o2 ans see if they are working and see whale your car is running.. Or if the o2 are lazy then I'd switch them first and then check it again.. Your cat should be good since you've had no problems with your car
On that topic, this is a great cheap way to check OBD2 datastreams, codes, etc.

Amazon.com: BAFX Products (TM) - ELM 327 Bluetooth OBD2 scan tool - For check engine light and other diagnostics - Android compatible: Car Electronics Amazon.com: BAFX Products (TM) - ELM 327 Bluetooth OBD2 scan tool - For check engine light and other diagnostics - Android compatible: Car Electronics


It streams to a freeware Torque app for Android (there's probably a variant for crApple, but those guys only care about blogging and can't change oil correctly), and can be used with most of the PC-based ELM327 scanner softwares.
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Old 10-06-2012, 07:41 PM   #4 (permalink)
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Joey your link sucks, however thanks for the tip, I'm buying one of those to see if it works in my Scion :P
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