oxygen sensor fault code

[aviel131]

hello
i have Audi A3 2000 (AGU)
i scanned my vehicle with vagcom and found this error: oxygen sensor heater circuit bank 1 sensor 1.
i replaced the oxygen sensor with used one and this problem still occur
what can fix that?

 

[<tuffty/>]

Did you clear the code first to see if it returned? You need to clear fault codes after fixing a problem as they dont clear themselves

<tuffty/>

 

[aviel131]

yes i cleared them its came back.

 

[<tuffty/>]

In that case I would suggest buying a new sensor...

<tuffty/>

 

[aviel131]

but how can it be the same fault code with 2 sensors?

 

[Squirt]

Check for a good power feed to the sensor and a good earth.

Then check resistance of the sensor. One of these tests should reveal the fault.

Nothing worse than throwing parts at a car in the hope it fixes it!

 

[<tuffty/>]

but how can it be the same fault code with 2 sensors?

Entirely possible if using a secondhand sensor... second hand means it could be as old as the one you are replacing it with and there is no reason to think that this old sensor is any better than your old sensor...


As Squirt has said though its worth checking the wiring but wiring faults tend to throw up multiple sensor faults as there are a few that hang off the same wiring...

What was the actual fault code?

<tuffty/>

 

[aviel131]

fault code is : oxygen sensor heater circuit bank 1 sensor 1

 

[<tuffty/>]

fault code is : oxygen sensor heater circuit bank 1 sensor 1

Fault code not description mate...

<tuffty/>

 

[Squirt]

It will be P0135, it's set due to the ECU seeing either no feedback from the sensor, either due to it being open circuit within the heating element or a specific wiring fault to that sensor.