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DTC P0137 OR P0157 Circuit Description 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. Did the DTC fail this ignition? Go to Step 2 Go to Step 21 21 Observe the Capture Info with a scan tool. - Go to Diagnostic Trouble Code (DTC) List System OK
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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