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Home >> Scion >> 2006 >> xA Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (1NZ-FE) >> SFI System >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) >> Typical Enabling Conditions

Typical Enabling Conditions

TYPICAL ENABLING CONDITIONS

Monitor runs whenever these DTCs not present P0011 (VVT system 1 - advance)
P0012 (VVT system - retard)
P0031, P0032 (heated oxygen sensor 1)
P0037, P0038 (heated oxygen sensor 2)
P0100 - P0103 (MAF meter)
P0115 - P0118 (ECT sensor)
P0120 - P0123 (TP sensor)
P0125 (insufficient ECT for closed loop)
P0130 (heated oxygen sensor 1)
P0134 (heated oxygen sensor 1)
P0136 (heated oxygen sensor 2)
P0171, P0712 (fuel system)
P0300 - P0304 (misfire)
P0335 (crankshaft position sensor)
P0340 (camshaft position sensor)
P0351 - P0354 (igniter)
P0500 (VSS)
Accumulated time that following conditions met 20 seconds
Battery voltage 11 V or more
IAT -10°C (14°F) or more
Idle OFF
MAF 8 to 25 g/sec.
Engine RPM Less than 4,500 rpm
ECT 75°C (167°F) or more
Estimated TWC temperature Up stream catalyst: 600 to 750°C (1,112 to 1,382°F) Down stream catalyst: 600 to 750°C (1,112 to 1,382°F)
Fuel system status Closed loop