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Test pipe CEL code?

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Old Jun 28, 2007 | 09:01 AM
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scratch137
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Default Test pipe CEL code?

Just wondering what the Check engine light code is that testpipes will throw if you dont have the little non-fouler things or whatever.
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Old Jul 1, 2007 | 04:49 PM
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P0420-Catalytic efficiency would be the main code. you might get some codes for the downstream O2 sensors as well.
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