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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Fuel pump shut off system
To minimize the risk of fuel leakage when the engine stalls or when an airbag inflates upon collision, the fuel pump shut off system stops the supply of fuel to the engine. Follow the procedure below to restart the engine after the system is activated. ► Vehicles without a smart key syst ...

Warning buzzer does not sound (key reminder warning, light reminder warning)
Wiring diagram Inspection procedere 1 Check buzzer Check that all of the warning buzzers sound. 2 Inspect front door courtesy lamp switch assy 3 Inspect un–lock warning switch assy 4 Check harness and connector(between un–lock warning switch and combination meter as ...

Inspection procedure
1 Check side squib(rh) circuit(airbag sensor assy center – front seat airbag assy rh) 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 front seat airbag assy ...