A fault code doesn’t yet mean the unit or sensor itself is faulty: often it’s the plug and connector leading to it.
Possible causes
- Exhaust leak
- Sensor
- Catalytic converter
What you can do yourself
- Check the exhaust for leaks.
Bank 1 is the side of the engine with cylinder 1. An inline engine only has bank 1.
On Oleg’s website:Car computer diagnostics ↗
The explanation comes from the error code reference in the AvtoElektrik PRO app.