FixVault

Home › Dodge and Ram › 2021 › ProMaster 2500 › Repair and Diagnosis › Engine Performance › System › 3.6L - DTCS P000A To P0138 › DTC Troubleshooting › P0051-O2-Sensor 2/1 Heater Circuit Low › When Monitored

When Monitored

Battery voltage between 10.5 and 15.75 volts.
The O2 Sensor Heater is commanded on.
The O2 Sensor Heater circuit high fault is not active.