P1142 Chevrolet HO2S12 Heater Circuit High
Possible causes
– Faulty HO2S12
– HO2S12 harness is open or shorted
– HO2S12 circuit poor electrical connection
– HO2S12 harness is open or shorted
– HO2S12 circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)