OBDII Code List

P1131 MAZDA - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank 1

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
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P1131 MAZDA Possible Causes

  • Vacuum leak affecting bank 1 only
  • Fuel injector problem bank 1
  • Check for cylinder misfire on bank 1
  • Engine mechanical condition
  • Faulty O2 sensor.

How do I fix code P1131 MAZDA

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

P1131 MAZDA Tech Notes

Though the Oxygen (O2) sensor, the Engine Control Module (ECM) has detected a lean system, which means that there is either not enough fuel or and excessive amount of air in the system. Start by checking for vacuum leaks.

Cost of diagnosing the P1131 MAZDA code

    Labor: 1.0

    The cost of diagnosing the P1131 MAZDA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

When is the P1131 MAZDA code detected?

The Engine Control Module (ECM) detected bank 1 oxygen (O2) at its lean limit

P1131 MAZDA Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1131 Mazda Description

Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank 1 is the generic description for the P1131 Mazda code, but the manufacturer may have a different description. Currently we have no further information abouth the P1131 Mazda OBDII code. Please post your question on our "Questions" section for more information: Questions.
OBDII Code P1131 Mazda - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank 1 -

P1131 MAZDA More Information

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