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?
- Limited driving only
- 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
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 an OE-quality ACDelco unit MAP sensor and inspect the short vacuum hose that connects MAP to the intake. Clean the sensor port with throttle body cleaner. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.
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 an OE-quality Motorcraft unit part. Check the 5V reference circuit at the PCM for shorts if a new sensor reads the same. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.
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.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
With key on, check MAP sensor signal voltage. Below 0.3V at atmospheric pressure indicates a low-output fault.
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Check wiring for open circuits between MAP sensor and PCM.
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Verify 5V reference supply to MAP sensor.
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Swap with a known-good sensor if wiring checks out.
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Inspect vacuum port for blockage (low vacuum reference causes a low reading).
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
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:
Commonly Affected Vehicles
- Dodge Ram and Jeep Grand Cherokee
- Chevrolet Silverado and Tahoe
- Honda CR-V and Element
- Ford Ranger
- Saturn Ion and Vue
Related Codes
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