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)
Other materials:
Uniform Tire Quality Grading
This information has been prepared in accordance with regulations issued by the
National Highway Traffic Safety Administration of the U.S. Department of Transportation.
It provides the purchasers and/or prospective purchasers of Toyota vehicles with
information on uniform tire quality grading.
...
Overhaul
Hint:
installation is in the reverse order of the removal. But the
installation is indicated only when it has a
point.
In the rh side, work in the same procedure as in the lh side.
1. Remove front armrest assy lh
Using a screwdriver, remove the front armrest.
Hint:
tape the ...
Circuit description
The rear heated oxygen sensor is used to monitor oxygen concentration in the
exhaust gas. For optimum
catalytic converter operation, the air fuel mixture must be maintained near the
ideal ”stoichiometric” ratio.
The heated oxygen sensor output voltage changes suddenly in the vicinity of ...