Code Enable Criteria

• Engine run time is more than 10 seconds.
• ECT is 40-230°F (4.5-110°C).
• MAF is 2-25 grams/second.
• Ignition voltage is more than 10 volts.
• Engine speed is more than 800 RPM.
• Fuel system is operating in DECEL control cell.
• IAT is 40-158°F (4.5-70°C).
• Short Term Fuel Trim (STFT) is .97-1.03.
• Engine load is 5-30 percent.
• BARO is more than 75 kPa.
• Vehicle speed is more than 25 MPH.
• DTCs P0102, P0103, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0171, P0172, P0300, P0440, P0442, P0443, P0446, P0449, P0506, P0507, P1112, P1114, P1115, P1121, P1122, P1133, or P1134 are not set.

DTC sets when pre-catalyst HO2S voltage remains more than a predetermined lean value during test and STFT does not increase a calibrated amount during test. Conditions must exist for 3 consecutive tests.