# P0420 on the 2010 Honda CR\-V

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

- [10141151](https://open.wenmarpro.com/bulletins/10141151), 2018-06-18: Dealer message \- American Honda \(AHM\) is investigating certain 2010 CR\-Vs with a complaint of the Malfunction Indicator Lamp \(MIL\) on with the DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting any further repair of any kind.
- [10129815](https://open.wenmarpro.com/bulletins/10129815), 2018-03-12: Dealer message \- American Honda \(AHM\) is investigating certain 2010 CR\-Vs with a complaint of the Malfunction Indicator Lamp \(MIL\) on with the DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting any further repair of any kind.
- [10129520](https://open.wenmarpro.com/bulletins/10129520), 2018-03-05: Dealer message \- American Honda \(AHM\) is investigating certain 2010 CR\-Vs \& Accord L4s with a complaint of the Malfunction Indicator Lamp \(MIL\) on with the DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting any further repair of any kind.
- [10129501](https://open.wenmarpro.com/bulletins/10129501), 2018-03-05: Dealer message \- American Honda \(AHM\) is investigating certain 2010 CR\-Vs \& Accord L4s with a complaint of the Malfunction Indicator Lamp \(MIL\) on with the DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.
- [10129479](https://open.wenmarpro.com/bulletins/10129479), 2018-03-05: Dealer message \- American Honda \(AHM\)is investigating certain 2010 CR\-Vs \& Accord L4s with a complaint of the Malfunction Indicator Lamp \(MIL\)on with the DTC P0420 \(Catalyst System Efficiency Below Threshold\)stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.
- [10129441](https://open.wenmarpro.com/bulletins/10129441), 2018-03-05: Engineering request for investigation \- American Honda \(AHM\) is investigating certain 2010 CR\-Vs \& Accord L4 with a complaint of the Malfunction Indicator Lamp \(MIL\) on with the DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.
- [10129439](https://open.wenmarpro.com/bulletins/10129439), 2018-03-05: Dealer message \- American Honda \(AHM\) is investigating certain 2010 CR\-Vs \& Accord L4s with a complaint of the Malfunction Indicator Lamp \(MIL\) on with the DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To fully understand the cause of this condition, AHM would like to inspect vehicle prior to you attempting any further repair of any kind.
- [10129322](https://open.wenmarpro.com/bulletins/10129322), 2018-02-26: Engineering request for investigation \- American Honda \(AHM\) is investigating certain 2010 CR\-Vs \& Accord L4 with a complaint of the Malfunction Indicator Lamp \(MIL\) on with the DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.
- [10129303](https://open.wenmarpro.com/bulletins/10129303), 2018-02-26: Dealer message \- American Honda \(AHM\) is investigating certain 2010 CR\-Vs \& Accord L4 with a complaint of the Malfunction Indicator Lamp \(MIL\) on with the DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.
- [10129274](https://open.wenmarpro.com/bulletins/10129274), 2018-02-26: Dealer message \- American Honda \(AHM\) is investigating certain 2010 CR\-Vs \& Accord L4 with a complaint of the Malfunction Indicator Lamp \(MIL\) on with the DTC P0420 \(Catalyst System Efficiency Below Threshold\) stored. To fully understand the cause of this condition, AHM would like to either inspect or collect specific parts from the vehicle prior to you attempting any further repair of any kind.