What are the possible causes of the P12A8 code?
- Faulty boost pressure sensor
- Boost pressure sensor harness is open or shorted
- Poor electrical connection in the boost pressure sensor circuit
How to repair the P12A8 code?
Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
What does the P12A8 code mean?
During the control module shutdown phase, the diagnostic function monitors the barometric pressure sensor, intake manifold sensor, and throttle body air intake side pressure sensor to determine if they all measure the same pressure. The ECM sets the OBDII code when the boost pressure sensor does not meet factory specifications.