Lack of Upstream Heated Oxygen Sensor Switch – Sensor Indicates Lean – Bank 1
Table of contents
- Possible Causes
- How To Fix
- Tech Notes
- Cost To Diagnose
- When is the code detected
- Possible Symptoms
- Description
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.
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
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 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 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 for your model and year vehicle. Currently, we have no further information about the P1131 Mazda OBDII code.Still have questions? Please post your question on our Comments Section below for more information.