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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Clutch
Preparation Sst Recomended tools Equipment Lubricant ...

Inspection procedure
1 Check operation(overdrive) Drive the vehicle after the engine warms up.  check that overdrive on e off occurs by an operation of the o/d switch on–off. 2 Inspect terminal voltage(od) Remove the cruise control ecu assy with the connector still connected.  tur ...

Under hood
General maintenance 1. General notes maintenance requirements vary depending on the country. Check the maintenance schedule in the owner’s manual supplement. Following the maintenance schedule is mandatory. Determine the appropriate time to service the vehicle using either miles driv ...