# P0420 on the 2009 Land Rover Range Rover Sport

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

- [10105785](https://open.wenmarpro.com/bulletins/10105785), 2017-06-09: "SITUATION: ON VEHICLES FITTED WITH THE 4.2L SC V8 ENGINE ONLY, THE ENGINE MALFUNCTION INDICATOR LAMP \(MIL\) MAY BE ILLUMINATED. UPON DIAGNOSIS, THE TECHNICIAN FINDS THAT DIAGNOSTIC TROUBLE CODE P0420 AND/OR P0430 ONLY ARE STORED IN THE ENGINE CONTROL MODULE \(ECM\). CAUSE: THIS MAY BE CAUSED BY THE ECM DIAGNOSTIC SOFTWARE INCORRECTLY REPORTING AN AGED/LOW EFFICIENCY CATALYTIC CONVERTER."
- [10104801](https://open.wenmarpro.com/bulletins/10104801), 2017-06-06: "ISSUE \-REPAIR TRIGGERED DUE TO MIL LIGHT CAUSED BY DTC P0430 OR P0420. \-MILEAGE: LESS THAN 80,000 MILES \-NO PREVIOUS INCIDENCE OF MISFIRE DTC P03XX CAUSE: POSSIBLE FAULT WITH EXHAUST CATALYTIC CONVERTER."