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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Outside vehicle
General maintenance Performing these maintenance checks on the vehicle in the owner’s responsibility. The owner may perform the maintenance or take the vehicle to a service center. Check the parts of the vehicle described below on a daily basis. In most cases, special tool are not requir ...

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 ...

Adjustment
1. Inspect park/neutral position switch assy  apply the parking brake and turn the ignition switch on.  depress the brake pedal and check that the engine starts only when the shift lever is set in n or p position and it does not start in the other position.  check that th ...