P0107: Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
Can you still drive? The vehicle may stall or run very poorly. If drivable, keep trips short and have it repaired within a day or two to avoid being stranded.
What Does P0107 Mean?
Code P0107 indicates that the voltage signal from the MAP sensor is lower than the expected minimum threshold, typically below 0.5 volts. This can indicate a sensor failure, a wiring issue, or an extreme vacuum condition. The ECM will use default values for fuel and timing calculations, resulting in poor engine performance.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Failed MAP sensor
- Open or shorted signal wire to MAP sensor
- Corroded MAP sensor connector
- Large vacuum leak pulling sensor signal very low
- Faulty ECM MAP sensor input circuit
Symptoms
- Check engine light on
- Engine runs rough or stalls
- Difficulty starting
- Lean running condition
- Reduced engine power
Diagnostic Steps
- 1Check MAP sensor voltage with key on, engine off; should read approximately 4.5V at atmospheric pressure
- 2Inspect wiring from MAP sensor to ECM for opens or shorts
- 3Verify 5V reference voltage is present at the MAP sensor connector
- 4Verify ground circuit continuity at sensor connector
- 5Swap with known good MAP sensor and retest
Recommended Parts & Tools
automotive multimeter
wiring repair connector kit
electrical contact cleaner
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $40 - $300 |
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Frequently Asked Questions
What causes low MAP sensor voltage?
Low voltage is typically caused by a failed sensor, a broken signal wire, or a corroded connector preventing the voltage signal from reaching the ECM. Check the wiring before replacing the sensor.
How do I test a MAP sensor?
With the key on and engine off, the MAP sensor should output approximately 4.5V (atmospheric pressure). At idle, it should drop to about 1.0-1.5V. Use a multimeter at the sensor connector to verify these readings.
Community Fix Reports
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