P0131Jeep Grand-cherokeeYears: 1996 - 2026
O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1)
Reviewed by ASE Certified Technician
What does this mean?
Code P0131 indicates the upstream O2 sensor on Bank 1 is reading a persistently low voltage, suggesting a lean condition.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Jeep Grand-cherokee models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
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Common Causes
Faulty oxygen (O2) sensor
Vacuum leak in intake system
Exhaust leak before oxygen sensor
Clogged or faulty fuel injector
Symptoms to Watch For
- Check Engine Light is illuminated
- Decreased fuel economy
- Rough or unstable idle
- Hesitation or stumble during acceleration