P0031 Diagnostic Trouble Code Discussion for August 2026
Air Fuel Sensor (Bank 1 Sensor 1) Heater Control Circuit Low Voltage
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| Help Request | Posted | |
| 2017 Ram ProMaster 2500 3.6L MIL Lamp on, MIL Lamp on VIN: 3C6TRVDG1H P0031: Oxygen A/F Sensor Heater Control Circuit Low. Good morning fellow techs. This one has me stumped. I'll admit I initially replaced the B1 O2 sensor without doing any tested. I thought I was on the right track as the sensor I removed was not OE. I performed the heater test and it completed without a cur... |
August 26, 2026 |
