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)

Share this page:

Other materials:

Confirmation driving pattern
Connect the hand–held tester or the obd ii scan tool to the dlc3.  record dtcs and the freeze frame data.  set the check mode using the hand–held tester .  read the value on the misfire counter for each cylinder when idling. If the value is displayed on the misfire c ...

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 ...

Replacement
1. Remove hood sub–assy 2. Remove cylinder head cover no.2 3. Remove battery 4. Remove battery carrier Remove the 4 bolts and battery carrier. 5. Remove air cleaner assembly with hose 6. Remove floor shift cable transmission control shift Remove the nut from the control shaf ...