P0107
Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
Powertrain Fuel and Air Metering Intake Pressure Sensing 🟡 Moderate — Fix within a week
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What This Actually Means
In plain language — no jargon

The MAP (Manifold Absolute Pressure) sensor is sending a voltage signal that's too low, telling the engine computer the intake pressure is abnormally low. Think of it like a tire pressure gauge stuck on 'empty' even though the tire is fine—the ECU gets confused and runs too rich.

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Symptoms You May Notice
3 known symptoms for this code
Check Engine Light illuminated
Rough idle or stalling at stops
Poor fuel economy and black smoke from exhaust
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Embedded Systems Insight
What the ECU/ECM is actually computing

The MAP sensor converts intake manifold absolute pressure into a voltage signal (typically 0.5–4.5V). The ECM expects this voltage to fall within a normal operating range based on engine load and altitude. A reading below ~0.25V for extended periods triggers P0107, indicating either a sensor failure, wiring short, or vacuum leak at the sensor.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
MAP Sensor Voltage 0.5–4.5V (varies with load) <0.25V or open circuit
Manifold Pressure 10–100 kPa (depending on conditions) <5 kPa sustained
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Vacuum hoses
Inspect and replace any cracked, loose, or disconnected vacuum lines connected to the MAP sensor and intake manifold.
2
MAP sensor connector
Reseat the electrical connector at the MAP sensor and check for corrosion or bent pins.
3
MAP sensor
Replace the MAP sensor if voltage remains low after vacuum and connector checks pass.