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Manifold Absolute Pressure/Barometric Circuit Low Input

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What P0107 means

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The control unit reports “Manifold Absolute Pressure/Barometric Circuit Low Input”. Code P0107 identifies the area to investigate, but it does not prove that one named part has failed without a confirming test and vehicle context.

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General information, not a diagnosis or repair instruction. Always confirm with a qualified mechanic for your specific vehicle.

When a warning involves the manifold absolute pressure (MAP) sensor, the order of checks matters more than the parts list.

What this code does not prove

This code describes a system observation about the manifold absolute pressure (MAP) sensor, not a verdict that one named part has failed. The same code can have more than one cause, so the paths must be separated by testing.

Where the diagnosis usually goes next

Check the signal at its source

Code P0107 describes a condition in the manifold absolute pressure (MAP) sensor: the signal reads at or near the bottom of its expected electrical range. That names where to look, but it does not by itself confirm which part has failed.

How to tell the paths apart: Read the live data and compare it against the expected range for current conditions before replacing anything.

Rule out wiring and the connector

Codes of this shape often come from damaged wiring, a corroded connector, or a poor ground on the manifold absolute pressure (MAP) sensor — not the component itself.

How to tell the paths apart: Inspect the wiring and connector for the manifold absolute pressure (MAP) sensor for damage and a secure ground before replacing anything.

Before you drive on

A code about the manifold absolute pressure (MAP) sensor alone cannot give a universal verdict for this specific vehicle. If the car is running normally, limit use to what is needed for diagnosis; any change in behaviour changes the decision.

Stop and arrange a check if

  • the engine is misfiring, losing power, or stalling
  • smoke, a fuel/burning smell, or overheating appears
  • the manifold absolute pressure (MAP) sensor's behaviour is clearly getting worse rather than staying stable

Before authorising a repair

  • Bring the complete code list and freeze-frame data relevant to the manifold absolute pressure (MAP) sensor
  • Ask for the test that confirms a fault in the manifold absolute pressure (MAP) sensor — not just the code alone

What to check first

  1. Read live data for the manifold absolute pressure (MAP) sensor and compare it against the expected range for current engine conditions.
  2. Inspect the wiring, connector, and ground for the manifold absolute pressure (MAP) sensor before replacing the component.
  3. A manifold pressure sensor reads close to atmospheric pressure with the key on and the engine off, then drops as the engine starts and vacuum builds at idle. A reading that stays near atmospheric with the engine running, or one that does not respond to throttle movement, usually means a disconnected vacuum line, a punctured intake hose, or a sensor/wiring fault rather than a mechanical engine problem — comparing key-on and idle readings against expected ranges separates the two quickly.
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Frequently asked questions

Does this code tell me the manifold absolute pressure (MAP) sensor has failed?

No. It points to the manifold absolute pressure (MAP) sensor; the cause still needs to be confirmed by a measurement or targeted test.

What should I bring to the workshop?

The complete code list, freeze-frame data, and the conditions around the manifold absolute pressure (MAP) sensor — that gives the technician context, not a guess.

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