What are the possible causes of code P129B?
- Faulty absolute pressure sensor
- Absolute pressure sensor harness is open or shorted
- Poor electrical connection in the absolute pressure sensor circuit
How to repair code P129B?
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 code P129B?
- Check engine light on (or Service Engine Soon warning light)
What does code P129B mean?
The engine control module (ECM) monitors the absolute pressure sensor. The ECM sets the OBDII code when the absolute pressure sensor does not meet factory specifications.