Express 1/2 Ton Van V8-305 5.0L VIN M SFI (1998)
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DTC P0151 Bank 2 Sensor 1 HO2S
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DTC P0137 Bank 1 Sensor 2 HO2S
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DTC P0143 Bank 1 Sensor 3 HO2S
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DTC P0157 Bank 2 Sensor 2.
When the VCM detects an HO2S signal circuit that is high, the VCM will set the following DTCs:
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DTC P0132 Bank 1 Sensor 1 HO2S
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DTC P0152 Bank 2 Sensor 1 HO2S
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DTC P0138 Bank 1 Sensor 2 HO2S
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DTC P0144 Bank 1 Sensor 3 HO2S
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DTC P0158 Bank 2 Sensor 2.
When the VCM detects no HO2S activity, the VCM will set the following DTCs:
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DTC P0134 Bank 1 Sensor 1 HO2S
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DTC P0154 Bank 2 Sensor 1 HO2S
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DTC P0140 Bank 1 Sensor 2 HO2S
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DTC P0146 Bank 1 Sensor 3 HO2S
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DTC P0160 Bank 2 Sensor 2.
NOTE: A fault in the heated oxygen sensor heater element or its ignition feed or ground will result in an increase in time to Closed Loop fuel
control. This may cause increased emissions, especially during start-up.
When the VCM detects a malfunction in the HO2S heater circuits, the following DTCs will set:
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DTC P0135 Bank 1 Sensor 1 HO2S heater
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DTC P0155 Bank 2 Sensor 1 HO2S heater
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DTC P0141 Bank 1 Sensor 2 HO2S heater
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DTC P0147 Bank 1 Sensor 3 HO2S heater
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DTC P0161 Bank 2 Sensor 2 heater.
The VCM also has the ability to detect HO2S response, switching, transition time, and incorrect ratio voltage problems. If an HO2S response
switching, transition time, or ratio problem is detected, the VCM will store a DTC which indicates degraded an HO2S performance.
DTC P0131 and DTC P0132 could also be set as a result of fuel system problems. Refer to System Diagnosis / Diagnostic Charts for testing
information. See: Powertrain Management/Computers and Control Systems/Testing and Inspection
