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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Headlight aim (vehicles with front side marker lights [bulb type] )
Vertical movement adjusting bolts Adjustment bolt A Adjustment bolt B Before checking the headlight aim Make sure the vehicle has a full tank of gasoline and the area around the headlight is not deformed. Park the vehicle on level ground. Make sure the tire inflation pressure is at the ...

Circuit description
The side squib (rh) circuit consists of the airbag sensor assy center and front seat airbag assy (rh). It causes the srs to deploy when the srs deployment conditions are satisfied. Dtc b0110/43 is recorded when a short is detected in the side squib (rh) circuit. Wiring diagram ...

Inspection procedure
Hint Advanced timing over (valve timing is out of specified range) P0011 Retarded timing over (valve timing is out of specified range) P0012 If dtc p0011 or p0012 is displayed, check the vvt system circuit. Read freeze frame data using the hand–held tester o ...