Conditions for Running the DTC

• DTCs P0106, P0107, P0108, P0115, P0117, P0118, P0122, P0123, P0125, P0128, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0171, P0172, P0201, P0202, P0203, P0204, P0217, P0300, P0336, P0337, P0341, P0342, P0351, P0352, P0402, P0404, P0405, P0406, P0441, P0443, P0488, P0502, P0506, P0507, P0562, P2195, and P2196 are not set.
• Before the ECM performs the idle test, the vehicle must be driven under the following conditions:
  • The calculated air flow into the engine is more than 7.8 g/s for more than 16 seconds for a manual transmission.
  • The calculated air flow into the engine is more than 11 g/s for more than 11 seconds for an automatic transmission.
• The transmission is in neutral or drive at idle.
• The engine is in closed loop fuel control.
• The EVAP purge concentration is learned.
• The engine is operating for more than 9.5 minutes.
• The calculated airflow into the engine at idle is between 2.25-7.5 g/s for an automatic transmission.
• The calculated airflow into the engine at idle is between 2.25-6.5 g/s for a manual transmission.
• The throttle position (TP) is less than 1.5 percent.
• The engine coolant temperature (ECT) is between 70-109°C (158-228°F).
• The intake air temperature (IAT) is between -7 and +105°C (+19 and +221°F).
• The barometric pressure (BARO) is more than 72 kPa.
• The calculated catalytic converter temperature is between 300-900°C (572-1,652°F).
• The long term fuel trim is learned.
• The engine idle time is less than 1 minute.
• The vehicle speed is less than 3 km/h (2 mph).
• DTC P0420 is ran one time per ignition cycle when the above conditions are met for more than 4.5 seconds.

The catalyst test is disable if the ECM detects one of the following conditions:

• The engine speed changes more than 80 RPM.
• The A/C compressor clutch changes state.
• The cooling fans change state.
• Insufficient air/fuel ratio activity.