P1131 = Insufficient switching O2 Bank 1 Sensor 1 Sensor/lean.
Could be a B1 S1 O2 sensor going bad.
This can be caused by a number of things, the most likely being a failure in the oxygen sensor or it's wiring, like a broken or corroded harness.
p1131 = lack of HO2S11 switches - sensor indicates lean
Code p0430
Trouble code P1131 means: Lack Of HO2S11 Switches - Sensor Indicates Lean
fuel air metering p1131 is code showing up
Trouble code P1131 means: Lack Of HO2S-11 Switch,Sensor Indicates Lean
Trouble code P1131 means: Lack Of HO2S11 Switches - Sensor Indicates Lean
Trouble code P1131 means: Lack Of HO2S11 Switches - Sensor Indicates Lean
P1131 code does not show up in the book. There is a code for P0131 which is the heated 02 sensor or circuit fail.
Trouble code P0420 means: Catalyst system efficiency below threshold (bank 1)
Trouble code P1131 means: Lack Of HO2S11 Switches - Sensor Indicates Lean
Trouble code P1131 means: Lack Of HO2S11 Switches - Sensor Indicates Lean