Conditions for Running the DTC

WARNING: This page is about a different variant/trim than selected.

DTCs P0030, P0036, P0068, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0120, P0121, P0122, P0123, P0130, P0131, P0132, P0133, P0134, P0135, P0136, P0137, P0138, P0140, P0141, P0171, P0172, P0201, P0202, P0203, P0204, P0220, P0300, P0315, P0326, P0327, P0336, P0340, P0341, P0442, P0446, P0452, P0453, P0455, P0496, P0502, P0506, P0507, P0601, P0602, P1133, P1516, P1621, P2135, P2138, P2176 are not set.
The engine has been running for more than 10 minutes.
The engine speed is within 200 RPM of the desired idle.
The engine coolant temperature (ECT) is between 75-126°C (167-259°F).
The barometric pressure (BARO) is more than 74 kPa.
The catalytic converter (TWC) calculated temperature is between 600-675°C (1,112-1,247°F).
The vehicle is in Closed Loop.
The intake air temperature (IAT) is between -20 and +100°C (-4 and +212°F).
The battery voltage is more than 10.7 volts.
The throttle position (TP) is 1.5 percent or less.
The short term fuel trim (FT) is between -10 and +10 percent.
The engine load must be stable.
Idle the engine and keep the vehicle in Drive, or depress the clutch pedal for a manual transmission vehicle, to activate the diagnostic. Within 60 seconds the air fuel ratio will transition lean, above 15.3, for up to 7 seconds, and then may transition rich, below 14.1, for up to 7 seconds.
Verify if DTC P0420 has passed or failed this ignition cycle with the scan tool.
This diagnostic attempts 1 test during each valid idle period, once the above conditions have been met. This diagnostic attempts up to 6 tests during each drive cycle.