Code Enable Criteria

For DTC to run, the following conditions must be met:

• DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0201-P0206, P0410, P0440, P0442, P0443, P0446, P0449 or P1441 are not set.
• Intake Air Temperature (IAT) and Engine Coolant Temperature (ECT) are less than 95°F (122°C) and within 11°F (6°C) of each other at engine start-up.
• Average Mass Airflow (MAF) for sample period is less than 20 grams/second.
• System voltage is 9-18 volts.

DTC will set when HO2S voltage remains within 150 mV of bias voltage (about 450 mV) for a longer time than normal. Amount of time ranges between 42 seconds and 2 minutes.