P122E BMW Possible Causes
- Faulty nitrogen oxide sensor Binary oxygen sensor
- Nitrogen oxide sensor Binary oxygen sensor wiring harness is open or short-circuited
- Nitrogen oxide sensor Poor electrical connection in the binary oxygen sensor circuit
How to Fix BMW P122E Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine service warning light soon)
P122E BMW Meaning
The Engine Control Module (ECM) monitors the nitrogen oxide sensor’s binary oxygen sensor. The ECM sets the OBDII code when the nitrogen oxide sensor’s binary oxygen sensor does not meet factory specifications.