P0040

P0040

Diagnosis information - DME

02 sensors upstream interchanged

"Interchanged oxygen sensors" means that the sensor connected to the DME control module as a sensor for bank 1 is in reality placed in the exhaust pipe of bank 2 and vice versa.

Diagnostic conditions
- Oxygen sensing active

NOTE: In this context, please also observe the function description.

Possible fault causes
- Oxygen sensor upstream interchanged (sensor for bank 1 is in exhaust assembly of bank 2 and vice versa)
- Engine harness repaired incorrectly (cable interchanged)