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System Description The powertrain control module (PCM) uses information from the crankshaft position (CKP) sensor and the Conditions for Running the DTC z DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0125, P0128, P0220, P0315, z The engine speed is between 450-5,000 RPM. z The ignition voltage is between 10-18 volts. z The engine coolant temperature (ECT) is between -7 and +130°C (+19 and +266°F). z The fuel level is more than 10 percent. z The throttle angle is steady within 1 percent. z The anti-lock brake system (ABS) and the traction control system are not active. z The transmission is not changing gears. z The A/C clutch is not changing states. z The PCM is not in fuel shut-off or decel fuel cut-off mode. z The PCM is not receiving a rough road signal. Conditions for Setting the DTC The PCM is detecting a crankshaft rotation speed variation indicating a misfire sufficient to cause emission 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
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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