Conditions for Running the DTC
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
- DTC P0030, P0031, P0032, P0036, P0037, P0038, P0050, P0051, P0052, P0053, P0054, P0056, P0057, P0058, P0059, P0060, P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0111, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0128, P0131, P0132, P0133, P0135, P0137, P0138, P013A, P013B, P013C, P013D, P013E, P013F, P0141, P014A, P014B, P0151, P0152, P0153, P0155, P0157, P0158, P015A, P015B, P015C, P015D, P0161, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0222, P0223, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P0279, P0280, P0282, P0283, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P1248, P1249, P124A, P124B, P124C, P124D, P16F3, P2101, P2135, P2147, P2148, P2150, P2151, P2153, P2154, P2156, P2157, P216C, P216E, P216F, P2270, P2271, P2272 or P2273 is not set.
- Engine speed is between 1, 000 - 2, 500 RPM to enable the catalyst diagnostic. Once the engine speed is in range, the engine speed must be between 950 - 2, 550 RPM to keep the test enabled.
- Accelerator pedal position is less than 100 %.
- Ethanol estimation is not active.
- Evaporative emission (EVAP) purge is not active.
- Post HO2S heaters are ON for greater than 60 s.
- Mass air flow (MAF) is between 4 - 20 g/s.
- System voltage is greater than 10 V.
- Vehicle speed is between 62 - 120 km/h (38.5 - 74.6 MPH) to enable the catalyst diagnostic. To keep the test enabled the vehicle speed is between 58 - 125 km/h (36 - 77.7 MPH).
- Catalyst calculated temperature is between 600 - 900°C (1, 112 - 1, 652°F).
- Engine is operating in closed loop.
- Engine is operating in decel fuel cut off (DFCO).
This diagnostic attempts one test during each valid OFF-idle period once the above conditions have been met. This diagnostic attempts up to 3 tests during each drive cycle.