Honda: MIL comes on with DTC P0420 (catalyst system efficiency below threshold) is stored
Honda technical service bulletin SB-10-015 for 2007-2008 Honda Fit.
- Bulletin number
- SB-10-015
- Component
- Engine and engine cooling: engine
- Summary
- 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.
Owners of these vehicles have filed 56 complaints in the engine category.
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