P1138 Cadillac 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
– 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)
Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan , Cadillac Catera , Cadillac DTS , Cadillac DeVille , Cadillac STS-V , Cadillac STS , Cadillac Seville , Cadillac XTS , Cadillac XLR , Cadillac XLR Platinum , Cadillac Escalade , Cadillac SRX