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Heated oxygen sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the Conditions for Running the DTC Lean Test Enable: z DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, z The Loop Status parameter is closed. z The Ignition 1 Signal parameter is between 10-18 volts. z The Fuel Tank Level Remaining parameter is more than 10 percent. z The TP Indicated Angle parameter is between 3-70 percent more than the value observed at idle. OR Power Enrichment Test Enable: z DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, z The Loop Status parameter is closed. z The Ignition 1 Signal parameter is between 10-18 volts. z The Fuel Tank Level Remaining parameter is more than 10 percent. z The Engine Run Time parameter is more than 30 seconds. z The Power Enrichment parameter is active for more than 1 second. Conditions for Setting the DTC Lean Test: The PCM detects that the affected HO2S voltage parameter is less than 200 mV for 165 seconds. OR Power Enrichment Test:
2004 Hummer H2 2004 ENGINE PERFORMANCE Engine Controls Diagnosis (DTC P0068 To DTC P0141/P0161) - 4.8L, 5.3L, and 6.0L - Hummer H2
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