P1131 MAZDA Possible Causes
- Vacuum leak affecting bank 1 only
- Fuel injector problem, bank 1
- Check for cylinder misfires on bank 1
- Engine mechanical condition
- Faulty O2 sensor.
How to fix P1131 MAZDA code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Technical Notes
Although the oxygen (O2) sensor, the engine control module (ECM) detected a lean system, meaning there is not enough fuel or an excessive amount of air in the system. Start by checking for vacuum leaks.
When is the code detected?
The engine control module (ECM) detected oxygen (O2) from bank 1 at its lean limit
Possible Symptoms
- Check engine light on (or service engine soon warning light)
P1131 MAZDA Meaning
Lack of heated oxygen sensor upstream switch – Sensor indicates lean – Bank 1 is the generic description for Mazda P1131 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about the Mazda P1131 OBDII code.