P0107

Universal

Manifold Absolute Pressure/Barometric Pressure Circuit Low Input

Definition source: General OBD-II reference catalog

Definition verification: Not independently verified for display.

Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium

Medium Severity

The engine computer monitors the manifold absolute pressure or barometric pressure circuit to estimate engine load and surrounding air pressure. This code means it detected a low input from that circuit. The cause could be the sensor or its wiring and connections; the code alone does not confirm that a part has failed. Depending on the vehicle, engine performance or fuel control may be affected, though some vehicles may show no noticeable symptoms.

Report an error with this code

⚠️ Before You Begin (Safety First)

If the engine stalls, runs very poorly, or responds unpredictably to the accelerator, pull over safely and arrange diagnosis rather than continuing to drive. If the vehicle runs normally, avoid hard driving and have the fault checked soon.

Common Symptoms

The check-engine light may be on, with no obvious change in how the vehicle drives.
Rough idle or hesitation may occur if the engine computer receives pressure information that leads it to estimate engine load incorrectly.
Reduced power or poor acceleration may occur if engine control is affected by the low circuit input.
Stalling or difficulty starting is possible on some vehicles if the fault significantly disrupts engine management.
Fuel economy or emissions may worsen if fueling or ignition control is affected.

Common Causes

A faulty manifold absolute pressure or barometric pressure sensor may produce a low circuit input.
A damaged, loose or corroded connector can interfere with the sensor circuit.
Wiring damage, including a signal wire shorted to ground or an open or poor connection, may cause an incorrect input.
A problem with the circuit's power or ground may affect the sensor signal.
A fault elsewhere in the monitored circuit may need to be ruled out before condemning the sensor.

Diagnostic Steps

Note whether the engine runs normally or has stalling, hesitation or other symptoms; stop driving if it stalls or becomes unsafe to control.
With the ignition off, visually inspect the accessible sensor connector and wiring for looseness, corrosion, fraying or damage. Do not pull on wires or probe terminals.
Check for other stored codes and save available freeze-frame information before clearing codes; related information can help guide diagnosis.
If a scan tool provides pressure data, record the readings and compare them with operating conditions using vehicle-specific service information. Do not assume a reading is correct or incorrect without that context.
If the fault remains, have the circuit tested with the correct wiring diagram and procedures. Avoid replacing the sensor based on this code alone.

When to Call a Professional

Check scan data and any related fault codes, then compare pressure readings with operating conditions using vehicle-specific service information. Inspect the connector and circuit, and test the sensor signal, power and ground as applicable. This helps distinguish a sensor problem from wiring, connection or circuit faults before replacing parts.

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Commonly Asked Questions

Does P0107 prove that the MAP sensor has failed?

No. It identifies a low input in the manifold absolute pressure/barometric pressure circuit. The sensor, connector, wiring, power or ground may need to be checked before deciding what has failed.

What does the MAP sensor do?

It measures pressure in the intake manifold so the engine computer can estimate engine load. Barometric pressure information helps the computer account for surrounding air pressure. The exact arrangement varies by vehicle.

Can I drive with P0107?

It depends on how the vehicle runs. If it stalls, loses power substantially or responds unpredictably, stop in a safe place and arrange assistance. If it drives normally, have it diagnosed soon and avoid hard driving.

Should I replace the sensor first?

Not without diagnosis. A damaged connector or wiring, or a power or ground issue, can also produce a low circuit input. Check the circuit before replacing parts.

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