P1138 SUZUKI HO2S Circuit High Voltage During Decel Fuel Cut-Off Sensor 2

Possible causes

– Vacuum leak on engine
– Faulty Failed Mass Air Flow (MAF)
– Faulty HO2S
– HO2S harness is open or shorted
– HO2S circuit poor electrical connection

Symptoms

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