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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Front differential oil seal
Replacement 1. Drain manual transaxle oil torque: 39.2 Nvm (400 Kgf·cm, 29 ft·lbf) 2. Remove front wheels 3. Remove engine under cover lh 4. Remove engine under cover rh 5. Drain transaxle oil 6. Remove front drive shaft assy lh  sst 09520–01010, 09520–24010 (09520–32040) 7. R ...

Cleaning and protecting the vehicle exterior
Perform the following to protect the vehicle and maintain it in prime condition: ● Working from top to bottom, liberally apply water to the vehicle body, wheel wells and underside of the vehicle to remove any dirt and dust. ● Wash the vehicle body using a sponge or soft cloth, such a ...

Inspection procedure
1 Check p squib circuit(airbag sensor assy center – instrument panel passenger airbag assy) Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.  disconnect the connectors between the airbag sensor assy center and the instrument panel ...