P0106 – Meaning, Causes, Symptoms, & Fixes

Code P0106 Definition

Manifold Air Pressure (MAP) Barometric Pressure Sensor Electric Circuit Output Range and Performance Problem

What Does P0106 Meaning?

Your car has a Manifold Absolute Pressure (MAP) Sensor that communicates with your Power Control Module (PCM) in order to measure and control your engine’s load. Your PCM needs the data from your MAP in order to control several important components of your vehicle, including parts of your ECM and your fuel ratio. Typically, the MAP sensor should be telling your PCM that your manifold pressure is between 1 to 4.5 Volts depending on if your car is at idle or at open throttle. Code P0106 is triggered when your PCM sees that the voltage pertaining to the manifold pressure is moving up and down in an erratic way, and also doesn’t see any corresponding change in engine load.

P0106 Symptoms

  • Check engine light
  • Rough running engine
  • Excessive smoke from exhaust
  • Lower  fuel economy
  • Erratic acceleration
  • Poor idle

P0106 Causes

  • Faulty MAP sensor
  • Faulty MAP sensor wiring
  • Leaks in air intake system
  • Open/Short in wiring for MAP sensor
  • MAP sensor affected by water or dirt

Code P0106 Severity- High

When Code P0106 is triggered, it is important that you address the problem as soon as possible. An issue with your MAP sensor can lead to noticeable engine problems, increased blow back smoke, and a lack of fuel efficiency. This is because your MAP isn’t communicating properly with your Throttle Position Sensor (TPS) or your PCM.

Code P0106 Common Diagnosis Mistakes

Replacing the MAP sensor before doing a thorough visual check for any intake manifold vacuum leaks thought could potentially create inaccurate MAP sensor readings.

 P0150 Diagnosis

  • Tools Needed to Diagnose:

Difficulty of Diagnosis and Repair – (1-4)

  1. Check to see if there are any other codes along with P0106 and clear your Check Engine Light with FIXD
  2. Check the freeze frame data in order to pinpoint the issue.
  3. Conduct a visual inspection of wiring around the vacuum line and intake system for fraying or disconnection.
  4. Use a Voltmeter to conduct a test of the output voltage from the MAP sensor. Make sure voltage is within specifications.
  5. If it is definitively determined that your MAP sensor is faulty, and you have confirmed that no problem exists with the sensor’s wiring and there are no leaks in the intake air system, the you will most likely have to replace your MAP sensor.
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