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Is the HO2S voltage parameter less than the specified Go to Step 6 Go to Step 5 5 Test the HO2S high signal circuit for an open or high - Go to Step 12 Go to Step 9 6 1. Remove the jumper wire from the previous step. 2. Connect a 3-amp fused jumper wire between the high signal circuit of the HO2S harness 3. Observe the HO2S voltage parameter with a scan tool. Is the HO2S voltage parameter less than the specified 100 Go to Step 8 Go to Step 7 7 Test the HO2S low signal circuit for an open or high - Go to Step 12 Go to Step 9 8 Test for shorted terminals and for poor connections at - Go to Step 12 Go to Step 10 9 Test for shorted terminals and for poor connections at - Go to Step 12 Go to Step 11 10 z A silicon contaminated HO2S z Fuel contamination - Refer to NOTE: Refer to Silicon Contamination of Heated Oxygen IMPORTANT: The HO2S may be damaged due to contamination. -
2004 Hummer H2 2004 ENGINE PERFORMANCE Engine Controls Diagnosis (DTC P0507 (TAC) To DTC U0107) - 4.8L, 5.3L, and 6.0L - Hummer H2
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