P0107: MAP/Barometric Pressure Circuit Low Input
Key takeaways
- P0107 means the manifold absolute pressure (MAP) sensor's signal voltage has dropped below the range the computer accepts, so it no longer trusts the reading.
- Check the sensor's connector, wiring and hose first; a loose, corroded or damaged connection causes it more often than a dead sensor.
- It is usually safe to drive short-term, but hesitation, stalling or reduced power mean get it fixed soon.
- If several sensor codes set at once, suspect a shared 5-volt reference circuit rather than several bad sensors.
What P0107 means
The sensor that measures pressure in your intake manifold is sending a signal that’s too low to be real. Scanners call it Manifold Absolute Pressure/Barometric Pressure Circuit Low Input, often shortened to MAP sensor circuit low. The MAP sensor gets a 5-volt reference and a ground from the engine computer and sends back a signal voltage that rises and falls with manifold pressure. When that signal stays below the lowest value a working sensor can produce, the computer stores P0107 and switches to a default value. A signal that low usually means the circuit is open, shorted to ground, or the sensor isn’t getting its 5 volts.
Is it safe to drive?
Yes, short-term, in most cases. The computer falls back on a substitute reading, so the engine usually runs close to normal, maybe with hesitation, a rough idle or worse fuel economy. The symptom that changes the answer: stalling, hard hesitation when you pull into traffic, or reduced power mode. Keep trips short and get it looked at soon. A flashing check engine light means a misfire; don’t drive far on that.
Causes, ranked
| Cause | How you confirm it | Typical cost (US independent shop, 2026) |
|---|---|---|
| Loose, corroded or water-damaged sensor connector | Look for green pins, a broken lock tab or a plug that isn’t fully seated | $20 to clean and reseat; $100–$250 to repair |
| Wiring chafed, shorted to ground or broken | Signal and 5-volt reference checked at the connector; signal changes when the harness is wiggled | $100–$250 |
| Shared 5-volt reference pulled down by another sensor | Several sensor codes set at once; reference returns when the other sensor is unplugged | $100–$250 for the wiring, plus that sensor if it’s shorted |
| Failed MAP sensor | Good reference and ground, but the signal stays low | $100–$300 |
| Cracked, plugged or disconnected hose to the sensor (remote-mounted sensors) | Visual check; blow through the hose | $50–$150 |
| Engine computer | Every other test passes; no 5-volt reference output | $800–$1,800 plus programming; rare |
Hose problems more often set P0106, but checking the hose takes a minute while you’re at the connector.
What to check first
- Start at the connector. Unplug it, look for corrosion or bent pins, and plug it back in until it clicks. Check the hose if your sensor has one.
- Read every code. P0107 with other sensor circuit codes (throttle, fuel pressure, or a reference-voltage code) points to a shared 5-volt circuit, not the MAP sensor.
- Check key-on, engine-off MAP. It should read close to local barometric pressure. A near-zero reading confirms a circuit or sensor fault.
- Test the circuit. A shop checks the 5-volt reference, ground and signal at the plug in a few minutes. That separates wiring from sensor.
- Follow the harness for rubbing spots against brackets or the engine.
- Replace the sensor last, then clear the code and drive a few days.
The bulletins lean toward wiring on trucks. GM tells technicians to inspect the engine harness for shorts on 2019–2021 Silverado and Sierra 1500 trucks, and has preliminary information on 2016 Escalade and Silverado and Sierra 2500 trucks setting P0107 alongside other circuit codes. Ram has a bulletin for 2019 Ram 1500s pairing P0107 with P0108, and Subaru revised the engine wiring harness on 2012–2014 WRX models.
What it costs
The cheap outcome is a cleaned and reseated connector, about $20. The common outcome is a wiring repair at $100–$250 or a new MAP sensor at $100–$300. The expensive outcome is rare: an engine computer at $800–$1,800 plus programming, only after every wire tests good. A diagnostic hour ($100–$180) spent on the circuit before parts is what keeps you from buying a sensor you didn’t need.
Related codes
P0108 is the same circuit reading too high, and P0106 is the in-range-but-wrong version. You may also see P0105 (MAP circuit) or airflow codes like P0101 because the computer cross-checks the sensors. 6 complaints filed with NHTSA mention P0107, across 6 models; those are owner reports, not confirmed causes. If you’re not sure how to pull every code, see how to read check engine light codes.
What owners report to NHTSA
6 complaints filed with NHTSA mention P0107, 4 of them since 2015, across 6 different models. The component owners most often filed it under: electrical system.
Manufacturer service bulletins that name P0107
35 technical service bulletins and manufacturer communications filed with NHTSA mention P0107, from 8 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- CHEVROLET SILVERADO 1500 (2019, 2020, 2021), bulletin 10193465: This Preliminary information communicates the following issues and directs dealership to inspect the engine harness for shorting. Some customers may comment on any of the following concerns: - SES MIL - No Start - No Cra…
- GMC SIERRA 1500 (2019, 2020, 2021), bulletin 10193465: This Preliminary information communicates the following issues and directs dealership to inspect the engine harness for shorting. Some customers may comment on any of the following concerns: - SES MIL - No Start - No Cra…
- RAM 1500 (2019), bulletin 10175652: Customer complaint may include MIL/Check Engine lamp on, other driveability complaints. Upon further investigation, fault codes P0107- Map Sensor Circuit Low, P0108-Map Sensor Circuit High, P2172-High Airflow/Vacuum Leak…
- FORD EXPLORER (2018, 2019), bulletin 10162063: Some 2018-2019 Explorer/Flex/Taurus/MKT vehicles equipped with a 3.5L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL), powertrain malfunction (wrench) lamp, Service AdvanceTrac message, Hill S…
- LINCOLN MKT (2018, 2019), bulletin 10162063: Some 2018-2019 Explorer/Flex/Taurus/MKT vehicles equipped with a 3.5L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL), powertrain malfunction (wrench) lamp, Service AdvanceTrac message, Hill S…
- CADILLAC ESCALADE (2016), bulletin 10114935: This Preliminary Information communication provides information to the technician about vehicles that may have Service Engine Soon Malfunction Indicator Lamp on or reduced power message. Technician may find Diagnostic Tr…
Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.
Frequently asked questions
Can I drive with P0107?
Usually for a short while. The computer substitutes a default value, so many cars run close to normal, maybe with hesitation or worse fuel economy. If the engine stalls, stumbles badly or goes into reduced power, keep trips short and get it checked.
Is P0107 always a bad MAP sensor?
No. P0107 is an electrical code: the signal is too low. A loose or corroded connector, a chafed wire, or a short on the shared 5-volt reference can all cause it. Check those before buying a sensor.
What's the difference between P0106, P0107 and P0108?
P0107 means the signal is too low and P0108 means it is too high, both usually electrical. P0106 means the signal is within range but doesn't make sense for how the engine is running, which points to vacuum leaks or hoses.
How much does it cost to fix P0107?
A reseated or cleaned connector costs little. A wiring repair runs $100–$250 and a new MAP sensor $100–$300 at a US independent shop.