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Common codes
P0420P0300P0171P0455P0442P0128P0401P0113

P0105: Manifold absolute pressure circuit malfunction

Drive carefully. Get it checked within a week or two.

Can I drive with P0105?

Yes, but drive carefully and get it checked soon. The engine cannot detect manifold vacuum, causing hard shifting and poor power delivery.

What does P0105 mean?

P0105 stands for Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction.

Symptoms you may notice

  • Engine hesitates or jerks when stepping on the gas
  • Rough, unsteady idle at stoplights
  • Reduced engine power and delayed gear shifts

How much does it cost to fix?

Repair costs for code P0105 depend on the specific underlying root cause, ranging from simple DIY checks to component replacement. The table below lists the most common causes and rough price ranges in USD:

  • Disconnected or cracked MAP vacuum hose
    $15-$40 common
  • Faulty MAP sensor electrical harness
    $40-$100 possible
  • Defective MAP sensor unit
    $90-$220 possible
  • Carbon buildup in intake manifold port
    $50-$120 rare

What to do next

  1. Verify the rubber vacuum hose to the MAP sensor is tight and leak-free.
  2. Inspect the wiring plug for loose pins or oil contamination.
  3. Scan live engine manifold pressure readings with the ignition on.
Last updated: October 2026

Related codes

P0106 P0107 P0108 P0171
General guidance only, not a professional diagnosis. If the check-engine light is flashing, or the car is running rough, overheating or losing power, stop driving and get help.

About this code

The Manifold Absolute Pressure (MAP) sensor tells the computer engine load based on vacuum. When code P0105 sets, the PCM defaults to fixed spark timing and fuel injection tables. Drivers experience hard shifting, loss of passing power, and poor gas mileage. Checking the small rubber vacuum line is the fastest first step.