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Catalyst system efficiency below threshold, bank 1. Catalyst system efficiency below threshold, bank 1.

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Q: What does the code p0420 in the 1998 Honda accord mean?
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Honda accord 2002 LX getting a code P0420 what does that code mean?

Trouble code P0420 means: Catalyst Efficiency Below Threshold (Bank 1)


Have a 2002 LX Honda accord 2.3L getting a code P0420 what does this mean?

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