P12B9 BMW - Ambient Pressure Sensor Overrun Pressure Too High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

P12B9 BMW Possible Causes

  • Faulty Ambient Pressure Sensor
  • Ambient Pressure Sensor harness is open or shorted
  • Ambient Pressure Sensor circuit poor electrical connection

How do I fix code P12B9 BMW

    Check 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's pins.

Cost of diagnosing the P12B9 BMW code

    Labor: 1.0

    The cost of diagnosing the P12B9 BMW code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

P12B9 BMW Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P12B9 BMW Meaning

During the control module's shutdown phase the diagnostic function monitors the barometric- pressure sensor, intake-manifold pressure sensor, and boost-pressure sensor to determine whether they are all measuring the same pressure. The ECM sets the OBDII code when the Ambient Pressure Sensor is not to factory specifications.
OBDII Code P12B9 BMW - Ambient Pressure Sensor Overrun Pressure Too High - Engine-Codes.com

P12B9 BMW More Information

Need more information on how to fix the P12B9 BMW code?
Get Access to Factory Service Manuals

Related Information