What are the possible causes of BMW P129A code?
- Faulty boost air pressure sensor
- Boost air pressure sensor harness is open or shorted
- Poor electrical connection in the boost air pressure sensor circuit
How to fix BMW P129A code?
Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
What are the possible symptoms of BMW P129A code?
- Check Engine Light on (or Service Engine Soon warning light)
What does BMW P129A code mean?
The Engine Control Module (ECM) monitors the boost air pressure sensor. The ECM sets the OBDII code when the boost air pressure sensor does not meet factory specifications.