Possible causes – Faulty EVAP Canister Purge Regulator Valve– EVAP Canister Purge Regulator Valve harness is open or shorted– EVAP Canister Purge Regulator Valve circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1426

Possible causes – Faulty Exhaust Gas Temperature Sensor– Exhaust Gas Temperature Sensor harness is open or shorted– Exhaust Gas Temperature Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Faulty fuel pressure control valve– Fuel pressure control valve harness is open or shorted– Fuel pressure control valve circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Faulty fuel pressure control valve– Fuel pressure control valve harness is short to ground– Fuel pressure control valve circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Faulty fuel pressure control valve– Fuel pressure control valve harness is short to ground– Fuel pressure control valve circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Faulty Fuel Pressure Sensor– Fuel Pressure Sensor harness is open or shorted– Fuel Pressure Sensor circuit poor electrical connection– Faulty fuel pressure control valve– Fuel pump high pressure Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1– HO2S Bank 1 Sensor 1 blown fuse– HO2S Bank 1 Sensor 1 harness is open or shorted– HO2S Bank 1 Sensor 1 circuit poor electrical connection Symptoms –

Possible causes – Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2– HO2S Bank 1 Sensor 2 blown fuse– HO2S Bank 1 Sensor 2 harness is open or shorted– HO2S Bank 1 Sensor 2 circuit poor electrical connection Symptoms –

Possible causes – Faulty Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1– HO2S Bank 2 Sensor 1 blown fuse– HO2S Bank 2 Sensor 1 harness is open or shorted– HO2S Bank 2 Sensor 1 circuit poor electrical connection Symptoms –

Possible causes – Faulty HO2 Sensor Bank 1 Sensor 1– HO2 Sensor Bank 1 Sensor 1 harness is open or shorted– HO2 Sensor Bank 1 Sensor 1 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty HO2 Sensor Bank 1 Sensor 1– HO2 Sensor Bank 1 Sensor 1 harness is open or shorted– HO2 Sensor Bank 1 Sensor 1 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty HO2 Sensor Bank 1 Sensor 1– HO2 Sensor Bank 1 Sensor 1 harness is open or shorted– HO2 Sensor Bank 1 Sensor 1 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty HO2 Sensor Bank 1 Sensor 2– HO2 Sensor Bank 1 Sensor 2 harness is open or shorted– HO2 Sensor Bank 1 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty HO2 Sensor Bank 1 Sensor 2– HO2 Sensor Bank 1 Sensor 2 harness is open or shorted– HO2 Sensor Bank 1 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty HO2 Sensor Bank 1 Sensor 2– HO2 Sensor Bank 1 Sensor 2 harness is open or shorted– HO2 Sensor Bank 1 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty HO2 Sensor Bank 1– HO2 Sensor Bank 1 harness is open or shorted– HO2 Sensor Bank 1 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) AUDI Technical Service Bulletins

Possible causes – Faulty HO2 Sensor Bank 1– HO2 Sensor Bank 1 harness is open or shorted– HO2 Sensor Bank 1 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) AUDI Technical Service Bulletins

Possible causes – Faulty HO2 Sensor Bank 2 Sensor 1– HO2 Sensor Bank 2 Sensor 1 harness is open or shorted– HO2 Sensor Bank 2 Sensor 1 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty HO2 Sensor Bank 2 Sensor 1– HO2 Sensor Bank 2 Sensor 1 harness is open or shorted– HO2 Sensor Bank 2 Sensor 1 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty HO2 Sensor Bank 2 Sensor 2– HO2 Sensor Bank 2 Sensor 2 harness is open or shorted– HO2 Sensor Bank 2 Sensor 2 circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon