Catalyst Location

Fig 1: Identifying Catalyst System Efficiency

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE:

When outputting DTC P0420 replace the exhaust manifold sub-assembly RH and the front exhaust pipe assembly together when catalyst replacement is necessary (Excluding air fuel ratio sensor and heated oxygen sensor).
When outputting DTC P0430 replace the exhaust manifold sub-assembly LH and the front exhaust pipe assembly together when catalyst replacement is necessary (Excluding air fuel ratio sensor and heated oxygen sensor).