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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On–vehicle inspection
1. Inspect refrigerant pressure with manifold gauge set  this is a method in witch the trouble is located by using a manifold gauge set. Read the manifold gauge pressure when the these conditions are established. Test conditions: temperature at the air inlet with the switch set ...

Bluetooth® Audio (Multimedia system)
Listening to Bluetooth® Audio The Bluetooth® audio system enables the user to enjoy music played on a portable player from the vehicle speakers via wireless communication. When a Bluetooth® device cannot be connected, check the connection status on the “Bluetooth* Audio” screen. If the ...

Sound quality is bad only when playing tape
Inspection procedure 1 Replace cassette tape with another and recheck Replace the cassette tape with another and recheck.  Replace the faulty cassette tape with the normal one to see if the same trouble occurs again. Standard: malfunction disappear. 2 Check for any foreig ...