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3 this DTC. 2. Turn OFF the ignition for 30 seconds. 3. Start the engine. 4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the Did the DTC fail this ignition? - Go to Step 4 Go to Diagnostic Aids 4 1. Observe the MAF Sensor parameter with a scan tool. 2. Move the harness and the connector of the mass air flow (MAF)/intake air temperature Does the movement of the harness or the connector - Go to Step 20 Go to Step 5 5 1. Turn OFF the ignition. 2. Inspect for the following conditions: z A restricted or collapsed air intake duct z A misaligned air intake duct z A dirty or deteriorating air filter element z Any objects blocking the air inlet screen z Any water intrusion in the Induction z Any contamination or debris on the Did you find and correct the condition? - Go to Step 28 Go to Step 6 6 Inspect the fuse in the ignition 1 voltage circuit of the - Go to Step 14 Go to Step 7 7 1. Turn ON the ignition, with the engine OFF. 2. Measure the battery voltage with a DMM. 3. Disconnect the MAF/IAT sensor. 4. Connect a test lamp between the ignition 1 voltage circuit of the MAF sensor and a good B+
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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