M.I.L. “ON” DTC P0420 – 2001-2003 Toyota Sienna
EG047-05 October 19, 2005 Title: M.I.L. “ON” DTC P0420 Models: ’01 – ’03 Sienna Introduction Under certain driving conditions, some 2001 – 2003 model year Sienna vehicles may exhibit a M.I.L. “ON” with the following DTC: P0420 (Catalyst System Efficiency Below Threshold [Bank 1]) The Engine Control Module (ECM) (SAE term: Powertrain … Read more