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P013500 O2 sensor heater

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August 3, 2025Aug 3

Audi A4 TDI 2013.

Had a few faults which have been sorted, but this one is just baffling us. We have changed the Lambda/Oxygen Sensor, but it is still coming up.

I've read that it could possibly be the fuse? I've looked everywhere and can't find a location for it. Any ideas where it is?

Any other ideas to to help fix would be appreciated.

Thank you in advance

August 3, 2025Aug 3

2 hours ago, wendyg said:

Audi A4 TDI 2013.

Had a few faults which have been sorted, but this one is just baffling us. We have changed the Lambda/Oxygen Sensor, but it is still coming up.

I've read that it could possibly be the fuse? I've looked everywhere and can't find a location for it. Any ideas where it is?

Any other ideas to to help fix would be appreciated.

Thank you in advance

Hi I believe you have two of these on your vehicle, problem is on that type of code reader it wont distinguish between sensor one and sensor two, if you can find someone with VCDS or similar that may well enlighten you.

Steve.

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P013500 O2 sensor heater

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Engine / ECU to Injector wiring loom

Are S5's notorious for not being serviced?

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