Engine-Codes - Mazda - P1131 MAZDA

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

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

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 is the P1131 MAZDA code repair?

Start by checking 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.

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.

What is the cost to diagnose the P1131 MAZDA code

Labor: 1.0

The cost to diagnose the P1131 MAZDA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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When is the code detected?

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

Possible Symptoms

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

P1131 MAZDA Meaning

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 for your model and year vehicle. Currently, we have no further information abouth the P1131 Mazda OBDII code.

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More Information

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