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2021
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ProMaster City Base
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Repair and Diagnosis
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Engine Performance
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System
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2.4L - DTCS C0061 To P0302
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DTC Troubleshooting
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P0031 - O2 Sensor 1/1 Heater Circuit Low
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Set Condition
Set Condition
The Powertrain Control Module (PCM) detects that the O2 Sensor 1/1 Heater circuit resistance is below approximately 2.0 Ohms.