LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2010 >> Matrix Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control (SFI) System (2ZR-FE) (Diagnostic Codes (P0010-P043E)) >> SFI System >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) >> Typical Enabling Conditions
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Typical Enabling Conditions

Monitor runs whenever following DTCs not present P0016 (VVT System Bank 1 - Misalignment)
P0017 (Exhaust VVT System - Misalignment)
P0102, P0103 (Mass Air Flow Meter)
P0112, P0113 (Intake Air Temperature Sensor)
P0115, P0117, P0118 (Engine Coolant Temperature Sensor)
P0120, P0121 P0122, P0123, P0220, P0222, P0223, P2135 (Throttle Position Sensor)
P0125 (Insufficient Engine Coolant Temperature for Closed Loop Fuel Control)
P0327, P0328 (Knock Sensor)
P0335 (Crankshaft Position Sensor)
P0340 (Camshaft Position Sensor)
P0351, P0352, P0353, P0354 (Igniter)
P0500 (Vehicle Speed Sensor)
Battery voltage 11 V or more
Intake air temperature -10°C (14°F) or more
Engine coolant temperature 75°C (167°F) or more
Atmospheric pressure coefficient 0.75 or more
Idling OFF
Engine RPM Less than 4000 rpm
Air fuel ratio sensor status Activated
Fuel system status Closed loop
Engine load 10 to 80%
All of the following conditions are met Condition 1, 2 and 3
1. Mass air flow rate 2.5 to 40 gm/sec
2. Front catalyst temperature (estimated) Automatic transaxle models: 660 to 840°C (1220 to 1544°F)
Manual transaxle models: 635 to 840°C (1175 to 1544°F)
3. Rear catalyst temperature (estimated) 400 to 760°C (752 to 1400°F)
Rear Heated oxygen sensor monitor Completed
Shift position 4th or more