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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 145 (Engine Control System & Fuel - 4.8L, 5.3L, 6.0L And 6.2L - DTC P0335 To DTC P3449) >> DTC P0420 or P0430 >> Conditions for Running the DTC

Conditions for Running the DTC

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  1. Driving Conditions
    • DTCs P0030, P0031, P0036, P0037, P0038, P0068, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0120, P0121, P0122, P0123, P0125, P0128, P0130, P0131, P0132, P0133, P0134, P0135, P0136, P0137, P0138, P0140, P0141, P0171, P0172, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0220, P0300, P0315, P0326, P0327, P0336, P0340, P0341, P0442, P0446, P0452, P0453, P0455, P0496, P0500 (manual transmission only), P0502, P0506, P0507, P0601, P0602, P0606, P0641, P0722, P0723, P1133, P1134, P1516, P1621, P2135, P2138, P2176 are not set.
    • The engine has been running for more than 10 minutes.
    • The vehicle has been driven at more than 1,000 RPM for more than 1 minute.
    • The vehicle is in Closed Loop.
    • The vehicle has Fuel Trim Learn enabled.
    • The engine coolant temperature (ECT) is between 70-125°C (156-257°F).
    • The barometric pressure (BARO) is more than 70 kPa.
    • The catalytic converter calculated temperature is greater than or equal to 450°C (842°F).
    • The intake air temperature (IAT) is between -20 and +85°C (-4 and +185°F).
    • The battery voltage is more than 11 volts.
  2. Idle Conditions
    • The vehicle speed is less than 3.2 km/h (2 mph).
    • For automatic transmissions, the transmission is in Reverse, Drive, or Low.
    • The throttle position (TP) is 2 percent or less.
    • The short term fuel trim (FT) is between -10 and +10 percent.
    • This diagnostic attempts one test during each valid idle period when the above conditions have been met. This diagnostic attempts up to 6 tests during each drive cycle.
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