AutoCodes - OBDII Code List - P12B9 MINI

P12B9 MINI - Ambient Pressure Sensor Overrun Pressure Too High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

P12B9 MINI 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 MINI?

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 MINI code

Labor: 1.0

The cost of diagnosing the P12B9 MINI code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

P12B9 MINI Description

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 Mini - Ambient Pressure Sensor Overrun Pressure Too High -

More Information

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