Possible causes – Faulty HO2S– Faulty Mass Air Flow Sensor– High fuel pressure– Canister purge solenoid stuck open– HO2S harness is open or shorted– HO2S circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S– Faulty Mass Air Flow Sensor– High fuel pressure– Canister purge solenoid stuck open– HO2S harness is open or shorted– HO2S circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S11 Sensor– Exhaust leak near HO2S11 Sensor– HO2S11 Sensor harness is open or shorted– HO2S11 Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S11 Sensor– Exhaust leak near HO2S11 Sensor– HO2S11 Sensor harness is open or shorted– HO2S11 Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S11– HO2S11 harness is open or shorted– HO2S11 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S12 Sensor– Exhaust leak near HO2S12 Sensor– HO2S12 Sensor harness is open or shorted– HO2S12 Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S12 Sensor– Exhaust leak near HO2S12 Sensor– HO2S12 Sensor harness is open or shorted– HO2S12 Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S12– Lean Air/Fuel Ratio- Check fuel system– HO2S12 harness is open or shorted– Blocked converter Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S21– HO2S21 harness is open or shorted– HO2S21 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S21– Fualty Mass Air Flow (MAF) Sensor– HO2S21 harness is open or shorted– HO2S21 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S22 Sensor– HO2S22 Sensor harness is open or shorted– HO2S22 Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty HO2S21– HO2S21 harness is open or shorted– HO2S21 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1131 VOLKSWAGEN Description HO2S21 Heather Oxygen Sensor Bank 2 Sensor 1
Possible causes – Faulty HO2S22 Sensor– HO2S22 Sensor harness is open or shorted– HO2S22 Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Faulty Ignition Coil 1– Ignition Coil 1 harness is open or shorted– Ignition Coil 1 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Engine may be running rough
Possible causes – Faulty Ignition Coil 1– Ignition Coil 1 harness is open or shorted– Ignition Coil 1 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Engine may be running rough
Possible causes – Faulty Ignition Coil 2– Ignition Coil 2 harness is open or shorted– Ignition Coil 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Engine may be running rough
Possible causes – Faulty Ignition Coil 2– Ignition Coil 2 harness is open or shorted– Ignition Coil 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Engine may be running rough
Possible causes – Faulty Ignition Coil 3– Ignition Coil 3 harness is open or shorted– Ignition Coil 3 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Engine may be running rough
Possible causes – Faulty Ignition Coil 3– Ignition Coil 3 harness is open or shorted– Ignition Coil 3 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Engine may be running rough
Possible causes – Faulty Ignition Coil 4– Ignition Coil 4 harness is open or shorted– Ignition Coil 4 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Engine may be running rough