# P0420 on the 2007 Honda Fit

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P0420

- [10036966](https://open.wenmarpro.com/bulletins/10036966), 2011-04-25: HONDA: MIL COMES ON WITH DTC P0420 \(CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD\) IS STORED. ECM/PCM MISINTERPRETS ENGINE IDLE CONDITIONS, RESULTING IN INACCURATE CONTROL OF THE FUEL AND IGNITION. REPLACE CATALYTIC CONVERTER, AND UPDATE THE PGM\-FI SOFTWARE WITH HDS. \*PE