Manifold Absolute Pressure Sensor Circuit Low Input
The P0107 code means the vehicle's onboard diagnostic system has detected: Manifold Absolute Pressure Sensor Circuit Low Input. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $30-$100 for MAP sensor
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Common Symptoms
- Check Engine Light on
- Engine runs lean (low MAP makes the ECU under-fuel)
- Hesitation, surging, or lack of power
- Rough idle
- Hard starting or stalling
Probable Causes (Ranked by Likelihood)
- Faulty MAP sensor output voltage too low Very High
- Open circuit or short to ground in signal wire High
- Vacuum line disconnected causing extreme low reading Moderate
- Failed sensor ground Low
Step-by-Step Diagnostic Procedure
-
With key on, check MAP sensor signal voltage. Below 0.3V at atmospheric pressure indicates a low-output fault.
-
Check wiring for open circuits between MAP sensor and PCM.
-
Verify 5V reference supply to MAP sensor.
-
Swap with a known-good sensor if wiring checks out.
-
Inspect vacuum port for blockage (low vacuum reference causes a low reading).
Common Fixes by Vehicle
What techs usually find when diagnosing P0107 on specific vehicles — tap your vehicle for the fix and the exact part:
2005-2014 GM 4.8L/5.3L/6.0L (Silverado, Tahoe, Suburban) Easy DIY
MAP sensor voltage reads too low due to a failed sensor or disconnected/cracked vacuum reference. Replace with ACDelco MAP sensor (213-796) and inspect the short vacuum hose that connects MAP to the intake. Clean the sensor port with throttle body cleaner.
Labor: 15-30 min2005-2015 Ford F-150/Mustang 4.6L/5.0L/5.4L Easy DIY
TMAP sensor (combined MAP/IAT) on top of intake manifold reads below expected voltage. Replace with Motorcraft part. Check the 5V reference circuit at the PCM for shorts if a new sensor reads the same.
Labor: 20-30 min2008-2016 Chrysler/Dodge 3.6L Pentastar Easy DIY
MAP sensor circuit low — failed sensor or ingested debris from an aftermarket intake system. Replace the MAP sensor and verify clean airflow path. If voltage remains low, check for a 5V reference short to ground in the harness.
Labor: 20-30 minFrequently Asked Questions
A low MAP signal makes the engine run lean -- why?
Low MAP voltage tells the ECU that manifold pressure is very low (high vacuum), suggesting a very light load with little air entering the engine. In a speed-density system the ECU calculates fuel directly from MAP, so it injects less fuel. Because the actual air entering the engine is normal, cutting fuel leaves the mixture too lean -- causing lean misfire, hesitation, surging, hard starting or stalling, and positive (adding) fuel-trim correction.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0107 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
See All Codes & Fixes for Your Vehicle
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