FixVault
Home
›
Jeep
›
2023
›
Grand Cherokee Laredo, AWD
›
Repair and Diagnosis
›
Engine Performance
›
System
›
3.6L - DTCS P0051 To P0122
›
DTC Troubleshooting
›
P0051 O2 Sensor 2/1 Heater Circuit Low
›
Set Condition
Set Condition
The Powertrain Control Module (PCM) detects that the O2 Sensor heater circuit resistance is below approximately 2.0 Ohms.