Fuel & air metering · Powertrain · generic (SAE-defined)
P0107: Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
P0107 means the manifold absolute pressure (MAP) sensor signal voltage is lower than the engine computer considers possible, usually indicating an electrical fault.
Standard title per SAE J2012 / ISO 15031-6 · Updated 2026-11-07 · By CarWhere Research
How P0107 sets
The powertrain control module (PCM) supplies the MAP sensor with a reference voltage and ground, and reads its signal. If the signal drops below the minimum expected value for a set time, P0107 sets. This usually means an open or grounded signal wire, a lost reference voltage or a failed sensor. Exact voltage limits are manufacturer-specific.
Common causes of P0107
Roughly most likely first; the actual cause depends on the vehicle and needs testing to confirm.
- Disconnected or corroded MAP connector
- Open or grounded MAP signal wire
- Loss of reference voltage to the sensor
- Failed MAP sensor
- Shorted sensor on a shared reference circuit pulling voltage down
P0107 symptoms
- Check engine light on
- Hesitation or stumble
- Rough idle or stalling
- Lean running or poor fuel economy
- Hard starting
How P0107 is diagnosed
- Scan for codes; reference voltage codes suggest a shared circuit fault
- Inspect the MAP connector and harness
- Measure reference voltage and ground at the connector
- Check the signal wire for continuity and shorts to ground
- Watch the MAP signal in live data while wiggling the harness
- Replace the sensor if the circuit is sound
Typical fixes for P0107
- Reconnect or repair the MAP connector
- Repair open or grounded wiring
- Restore the reference voltage by repairing a shorted shared sensor
- Replace the MAP sensor
Replace parts only after testing confirms the cause — a code names the circuit or condition that failed a check, not necessarily the faulty part. We don’t publish per-repair prices; for what households actually spend on upkeep, see car repair costs.
Related codes & warning lights
P0107 FAQ
What does code P0107 mean?
P0107 means the manifold absolute pressure (MAP) sensor signal voltage is lower than the engine computer considers possible, usually indicating an electrical fault. The standard definition is "Manifold Absolute Pressure/Barometric Pressure Circuit Low Input."
Can I drive with a P0107 code?
You can usually drive a short distance, but the engine may hesitate, run rough or stall. Repair soon to restore proper fuel control.
Can a bad throttle position sensor cause P0107?
If the two sensors share a reference voltage circuit, a short in one can drag the reference down and set codes on the other.
Is P0107 a vacuum leak code?
Not usually. Vacuum leaks tend to cause performance codes like P0106, while P0107 points to an electrical low signal.
Keep researching
Engine guides by brand (known issues, specs)
More fuel & air metering codes
Sources
- SAE J2012 — Diagnostic Trouble Code Definitions (standard code titles)
- ISO 15031-6 — Road vehicles: communication between vehicle and external equipment for emissions-related diagnostics, Part 6: Diagnostic trouble code definitions
- U.S. EPA — Vehicle Emissions Inspection and Maintenance (I/M) programs
- U.S. EPA, 40 CFR 86.1806-17 — Federal onboard diagnostics requirements for light-duty vehicles
- California Air Resources Board — On-Board Diagnostic (OBD) Program
General information written by CarWhere Research, not a diagnosis of your vehicle. Manufacturers can add their own sub-definitions and test conditions; confirm with the factory service information for your year, make and model. Before paying for a repair, check NHTSA for open recalls and your warranty booklet: federal law requires an emissions warranty on major emission-control parts such as the catalytic converter and engine computer.