> Gen 2 (2004-2009) Toyota Prius Forums > Gen 2 Prius Care, Maintenance and Troubleshooting > HELP, where to start - P0420, P1116, P1150, B1421 & B1475Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by AzNative73, Yesterday at 5:38 PM. ...