P0147 Volkswagen O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 3
Possible causes
– Faulty Heated Oxygen Sensor Bank 1 Sensor 3
– Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted
– Heated Oxygen Sensor Bank 1 Sensor 3 circuit poor electrical connection
– Heated Oxygen Sensor Bank 1 Sensor 3 harness is open or shorted
– Heated Oxygen Sensor Bank 1 Sensor 3 circuit poor electrical connection
What about the obd code?
During testing the oxygen sensor (HO2S) heaters are checked for open and short circuits and exessive current draw
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– High Fuel Consumption
– Excessive Smoke from Exhaust
– High Fuel Consumption
– Excessive Smoke from Exhaust
P0147 Volkswagen Description
The rear heated oxygen sensor (or sensor 3 for some vehicles), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Even if switching characteristics of the heated oxygen sensor 1 are shifted, the air-fuel ratio is controlled to stoichiometric, by the signal from the heated oxygen sensor 3.
This sensor is made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. Under normal conditions the heated oxygen sensor 3 is not used for engine control operation.
Volkswagen Vehicle:Volkswagen CC,Volkswagen Eos,Volkswagen Golf,Volkswagen GTI,Volkswagen Jetta,Volkswagen New Beetle,Volkswagen Passat,Volkswagen Routan,Volkswagen Tiguan,Volkswagen Touareg,Volkswagen Beetle,Volkswagen Golf,Volkswagen Polo,Volkswagen Touran,Volkswagen up,Volkswagen Sharan,Volkswagen Santana,Volkswagen Lavida