P1131 Chevrolet HO2S Circuit Low Variance Bank 1 Sensor 2

Symptoms

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

P1131 Chevrolet Description

A Heated Exhaust Oxygen (HO2S) sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.