K 3500 Truck 4WD V8-5.7L VIN R (1998)
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DTC P0137 Bank 1 Sensor 2 HO2S
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DTC P0143 Bank 1 Sensor 3 HO2S
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
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
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
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.
