LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Jeep
>>
2024
>>
Gladiator Nighthawk, Part Time T/Case Control, Automatic Trans
>>
Repair and Diagnosis (Single Page)
>>
Engine Performance
>>
System
>>
3.6L (GPEC 2A) - DTCS P0138 To P0158
>>
DTC Troubleshooting
>>
P0138-O2 Sensor 1/2 Circuit High
>>
When Monitored
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
When Monitored
This diagnostic runs continuously when the following conditions are met:
Battery voltage between 11.0 and 15.75 volts.
With the engine running.