Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
Our emissions expert has put together the following information about the P0107 fault code. We have also included diagnostic procedures you can take to your repair shop if the mechanic is having difficulty analyzing the code.
OBD II Fault Code
- OBD II P0107
Fault Code Definition
The Manifold Absolute Pressure Sensor/Barometric Pressure Sensor measures the rise and fall of the air pressure inside the Intake Manifold. This provides critical data needed for the Powertrain Control Module (PCM) to control the Air Fuel Ratio, the Ignition Spark Timing, and many components of the Emissions Control Systems. The Manifold Absolute Pressure/Barometric Pressure Sensor converts the Intake Manifold air pressure into a voltage that is high when the Intake Manifold air pressure is high and low when the Intake Manifold air pressure drops to a vacuum. A P0107 code indicates a low voltage input from the Manifold Absolute Pressure Sensor/Barometric Pressure Sensor to the PCM.
Symptoms
- Check Engine Light will illuminate
- In some cases, the engine may be hard starting and/or get poor fuel economy
- In some cases, noticeably poor engine performance may occur
Common Problems That Trigger the P0107 Code
- Manifold Absolute Pressure Sensor/Barometric Pressure Sensor is defective
- Faulty or corroded Manifold Absolute Pressure Sensor/Barometric Pressure wiring or connections
Common Misdiagnosis
- Manifold Absolute Pressure Sensor/Barometric Pressure Sensor is replaced when the real cause is a short in the MAP Sensor wiring.
