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Home >> Acura >> 2009 >> TSX Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Advanced Diagnostics >> DTC P0420: Catalyst System Efficiency Below Threshold >> Enable Conditions
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Enable Conditions

ENABLE CONDITIONS CHART

Condition Minimum Maximum
Elapsed time that secondary HO2S activity is not monitored after starting the engine 15 seconds -
Engine coolant temperature 156°F (69°C) -
Intake air temperature -13°F (-25°C) -
Estimated TWC temperature 1,112°F (600°C) -
Vehicle speed 26 mph (41 km/h) -
Fuel trim 0.69 1.47
Fuel feedback Other than wide open throttle
Closed loop at stoichiometric
No active DTCs P0010, P0011, P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0122, P0123, P0133, P0134, P0135, P0137, P0138, P0139, P0141, P0171, P0172, P0222, P0223, P0300, P0301, P0302, P0303, P0304, P0335, P0339, P0340, P0341, P0344, P0351, P0352, P0353, P0354, P0443, P0496, P0497, P060A(1), P1009, P1109, P1128, P1129, P1157, P1172, P145C, P1659, P2101, P2118, P2122, P2123, P2127, P2128, P2135, P2138, P2176, P2195, P2227, P2228, P2229, P2238, P2252, P2279, P2646, P2647, P2648, P2649, P2A00
Others Has record of deceleration at least once
Cruise load or more
(1) A/T model