Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Catalyst system efficiency below threshold

Toyota Corolla (E120): Catalyst system efficiency below threshold

Dtc p0420 catalyst system efficiency below threshold (bank 1)

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Cooling
Preparation Recomended tools Equipment Coolant ...

On–vehicle inspection
1. Inspect w/receiver condenser assy  if a fin of the w/receiver condenser assy is dirty, clean it with water and dry it with compressor air. Notice: do not damage the fin of the w/receiver condenser assy.  if a fin of the w/receiver condenser assy is bent, make it straig ...

Basic inspection
Resistance measuring condition of electronic parts  unless stated, all resistance is measured at an ambient temperature of 20 c (68 °F). As the resistance may be outside the specifications if measured at high temperatures immediately after the vehicle has been running, measu ...