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percent. The values for the Short Term fuel trim change rapidly in response to the heated oxygen sensor (HO2S) Conditions for Running the DTC z DTCs P0101, P0103, P0108, P0135, P0137, P0141, P0200, P0300, P0410, P0420, P0430, P0440, P0442, z The engine coolant temperature (ECT) is between 75-115°C (167-239°F). z The intake air temperature (IAT) is between -20 to +90°C (+4 and +194°F). z The manifold absolute pressure (MAP) is between 26-90 kPa (3.7-13 psi). z The vehicle speed is less than 137 km/h (85 mph). z The engine speed is between 400-3,000 RPM. z The barometric pressure (BARO) is more than 74 kPa (10.7 psi). z The mass air flow (MAF) is between 5-90 g/s. z The fuel level is more than 10 percent. z The throttle position (TP) is less than 90 percent. Conditions for Setting the DTC z The average long term fuel trim value is below -13 percent. z All of the above conditions are present for 40 seconds. Action Taken When the DTC Sets z The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition z The control module records the operating conditions at the time the diagnostic fails. The first time the Conditions for Clearing the MIL/DTC z The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles z A current DTC, Last Test Failed, clears when the diagnostic runs and passes. z A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other
2004 Hummer H2 2004 ENGINE PERFORMANCE Engine Controls Diagnosis (DTC P0171/P0174 To DTC P0507 (TAC)) - 4.8L, 5.3L, and 6.0L - Hummer H2
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