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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If the vehicle becomes stuck
Carry out the following procedures if the tires spin or the vehicle becomes stuck in mud, dirt or snow: Recovering procedure 1. Stop the engine. Set the parking brake and shift the shift lever to P. Do not press the shift release button after shifting the shift lever to P. 2. Remove the mud, snow ...

Problem symptoms table
Hint: proceed with troubleshooting of each circuit in the table below. Symptom Suspect area When the ignition switch is in the on position, the srs warning light sometimes comes on after approximately 6 seconds.  Srs warning light ci ...

Lubrication system
On–vehicle inspection 1. Check engine oil level  after warming up the engine and then 5 minutes after the engine stops, oil level should be between the ”l” and ”f” marks on the oil level gage. If low, check for leakage and add oil up to the ”f” mark. Notice: do not ...