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2015 JEEP CHEROKEE
3.2L V6•AWD•AUTOMATIC•gas
11 active safety recalls on this vehicle — view recalls
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Repairs0Labor987Torque6853Fluid17DTC2320Battery2Maintenance0Recalls11
P0131moderate severityPowertrain

O2 Sensor Circuit Low Voltage Bank 1 Sensor 1

on 2015 Jeep Cherokee 3.2L V6 · AWD

What this code means

The upstream O2 sensor voltage on Bank 1 is staying below 0.45V, indicating a lean condition or sensor fault.

Symptoms

  • Check Engine Light
  • Lean running
  • Poor fuel economy
  • Rough idle

Common causes

  • Vacuum leak
  • Faulty O2 sensor
  • Exhaust leak before sensor
  • Low fuel pressure
  • Faulty fuel injector

Diagnostic steps

  1. Check for vacuum leaks
  2. Monitor O2 sensor voltage
  3. Test fuel pressure
  4. Perform smoke test on intake
  5. Inspect O2 sensor

Repair notes

Fix vacuum or exhaust leak. Replace O2 sensor if confirmed faulty.

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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