P0107 code: Manifold Absolute Pressure (MAP) Sensor Circuit Low
P0107 means manifold Absolute Pressure (MAP) Sensor Circuit Low. The code says where to look, not what failed — the fix depends on which cause your car actually has.
What P0107 means
The manifold absolute pressure (MAP) sensor measures intake-manifold pressure, which tells the computer how hard the engine is working so it can set the right fuel and timing. P0107 means the MAP signal is reading too low (or shorted to ground). The usual causes are a failed sensor or a wiring/connector fault. Because the computer relies on this for fueling, a bad MAP reading can cause rough running, poor power, and bad fuel economy.
P0107 symptoms
- Rough idle or stalling
- Hesitation or poor acceleration
- Reduced fuel economy
- Black smoke or a rich/lean running condition
- Check-engine light
What it costs to fix P0107
Typical range: $50–$300 · about ~0.3–1 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| MAP sensor | $30–$120 | ~0.3–0.8 hrs |
| Wiring / connector repair | $10–$120 | ~0.5–1.5 hrs |
The MAP sensor is inexpensive and usually easy to reach, so this is typically a low-cost repair. A wiring short takes a bit longer to find but the parts are cheap.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0107 for my exact vehicle →
How to fix P0107
Easy — basic tools, most owners can do this
- Check the MAP sensor connector
Unplug the connector and inspect for corrosion, pushed-out terminals, or a broken locking tab letting it back off the sensor. Reseat it firmly — an intermittent connection reading as a dead-low signal is a common and free fix.
- Verify the 5-volt reference supply
With the key on, backprobe or probe the connector and confirm the sensor is receiving its 5-volt reference and has a good ground. If the reference is missing, the fault is upstream in the harness or shared with other sensors on the same 5V circuit — not the MAP itself.
- Inspect the signal wire for a short to ground
Trace the harness from the sensor looking for chafe points where the signal wire could touch bare metal, especially near brackets and the engine lifting points. A grounded signal wire pegs the reading at zero exactly as this code describes.
- Replace the MAP sensor
If the sensor has power, ground, and an intact signal wire but still outputs nothing, the sensor has failed internally. Swapping it takes minutes on most engines; clear the code and confirm the key-on reading now shows roughly atmospheric pressure.
DIY or shop? Reseating the connector and swapping the sensor are genuinely easy DIY, and a basic multimeter handles the 5-volt check with a wiring diagram in hand. Go to a shop if the 5-volt reference is dead — that circuit often feeds several sensors, and finding where a shared reference shorted out is fiddly diagnostic work. Don't drive far with the code active, since bad MAP data can mean poor running and wasted fuel.
Tools for the DIY steps: Multimeter · OBD2 scanner · Screwdriver or small socket set · Electrical contact cleaner · Wiring diagram for your vehicle
Not sure which step applies to your car? Get the likely cause for your exact vehicle before buying anything for P0107.
Start a case with P0107 and your car. Redline weighs these causes against what your car shows, and names the check that would settle it before you buy parts.
Can I drive with P0107?
Redline can’t determine from a symptom or code alone whether your car is safe to drive.
P0107: common questions
Can I drive with P0107?
That depends on the whole car, not just this code. Expect rough running or hesitation; get it diagnosed promptly and fix it before an emissions test. If the engine stalls, stop driving and have it towed.
What does the MAP sensor do?
It measures how much pressure (or vacuum) is in the intake manifold, which reflects engine load. The computer uses that to decide how much fuel to add and when to fire the spark, so a wrong reading throws off running.
Is P0107 the sensor or the wiring?
Either — a failed sensor is common, but a wire shorted to ground or a corroded connector reads the same way. Checking the wiring first can save replacing a sensor that was fine.
How much does it cost to fix P0107?
Usually inexpensive — the MAP sensor is cheap and easy to reach, and wiring repairs are modest. Confirm the wiring before buying the sensor.
Related trouble codes
Don’t have a scanner yet? A ~$25 Bluetooth adapter reads codes like P0107 from your phone. See our guide to the best OBD2 Bluetooth adapters. Run a repair shop? See Redline for shops.
Generic OBD-II reference. Manufacturer-specific behavior varies. Confirm with a scan tool and, for safety-related codes, a professional inspection. Cost ranges are reference ranges, not quotes.
Seeing P0107 on your car?
Every problem becomes a Case. Tell Redline what the car is doing: it shows what the evidence supports, what’s still missing, and what to check next, before you approve a repair.
“Inner pad ~1 mm. Outer pad 3 mm.”
Next: check the slide pins move freely before buying parts.