P0107 on 2018-2019 Lincoln MKT: Causes and Fixes for MAP Sensor Circuit Low

What's Unique About the 2018-2019 Lincoln MKT

For this specific vehicle and year range, the P0107 code is directly addressed by a manufacturer's Technical Service Bulletin (TSB 19-2212). This TSB identifies a faulty Manifold Absolute Pressure and Temperature (MAPT) sensor as the likely culprit for the 3.5L EcoBoost engine in the MKT and its platform mates (Explorer, Flex, Taurus). This elevates the issue from a general diagnostic problem to a recognized pattern of failure, making the diagnosis much more straightforward than on other vehicles where wiring or vacuum leaks might be more common causes. The PCM disables safety systems like AdvanceTrac as a precaution when it receives illogical data from a critical engine sensor like the MAP, as it can no longer trust the engine's reported load.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Check Engine Light (Malfunction Indicator Lamp, MIL) is on
• Powertrain malfunction (wrench) lamp is on.
• "Service AdvanceTrac" message displ 🎬 See why engine sensor faults trigger these AdvanceTrac warnings.ayed. This occurs because the powertrain computer can't rely on engine torque calculations when the MAP sensor signal is invalid, so it disables the stability control system as a precaution.
• "Hill Start Assist Not Available" message displayed.
• Cruise control may be inoperative.
• Lack of power or sluggish acceleration, especially from a stop, which may feel like a transmission problem.
• Rough or unstable idle
• Increased fuel consumption
• Black smoke from the exhaust

Most Likely Causes

1. Faulty Manifold Absolute Pressure and Temperature (MAPT) Sensor 🔴 High Probability A Ford/Lincoln TSB (19-2212) was issued specifically for this problem on 2018-2019 models with the 3.5L EcoBoost engine, indicating a known issue with the original sensor.
   How to confirm: With an OBD-II scanner, monitor the MAP sensor voltage (PID). If it reads below the specified threshold (typically under 0.5 volts) with the key on and engine off, the sensor is likely faulty. The TSB procedure involves comparing the MAP (PRESS) PID value to the Barometric Pressure (BARO) and Throttle Body Pressure (TCBP) PIDs with the key on, engine off. If the MAP reading deviates by more than 1.5 psi (10.35 kPa) from the other sensors, the sensor is confirmed faulty and needs replacement.
   Typical fix: Replace the MAPT sensor. It is located on top of the intake manifold, easily accessible after removing the engine cover. It is held in by a single T20 Torx screw. After removing the screw, the sensor may require some wiggling to break the O-ring seal. Lubricating the O-ring on the new sensor with a small amount of engine oil is recommended for easier installation.
   Est. part cost: $40-$80
2. Wiring or Connector Issue ⚪ Low Probability
   How to confirm: Visually inspect the MAPT sensor connector and wiring harness for any signs of damage, corrosion, or loose connections. Use a multimeter to check for the correct reference voltage (typically 5V) and ground at the connector with the key on.
   Typical fix: Repair the damaged section of the wiring harness or clean/replace the connector.
   Est. part cost: $5-$50

Rare But Worth Checking

• Powertrain Control Module (PCM) Fault: This is extremely rare and should only be considered after the sensor and wiring have been definitively ruled out as the cause. A faulty PCM can fail to correctly read the signal from a perfectly good sensor.

Diagnosis Steps

1. Connect an OBD-II scanner to the vehicle's diagnostic port.
2. Confirm that P0107 is present. Check for other related codes like P0108 or P0109.
3. Review the symptoms. If they include a wrench light, lack of power, and AdvanceTrac messages, it strongly points to the issue described in TSB 19-2212.
4. Given the high probability from the TSB, the primary diagnostic step is to replace the MAPT sensor. The sensor is located on top of the intake manifold.
5. Remove the plastic engine cover by first removing the oil cap, lifting the cover, and then reinstalling the oil cap to prevent debris from entering the engine.
6. Disconnect the electrical connector from the sensor. Inspect the connector for damage or corrosion.
7. Using a T20 Torx bit, remove the single screw securing the sensor.
8. Gently twist and pull the old sensor out of the intake manifold.
9. Apply a small amount of clean engine oil to the O-ring of the new sensor to aid installation and ensure a good seal.
10. Install the new sensor, secure it with the T20 screw, and reconnect the electrical connector.
11. Reinstall the engine cover.
12. Clear the diagnostic trouble codes with the OBD-II scanner and take the vehicle for a test drive to confirm the fix.

Parts You'll Likely Need

• Manifold Absolute Pressure and Temperature (MAPT) Sensor (OEM #AA5Z-9F479-E) — This is the component identified as faulty in the manufacturer's Technical Service Bulletin (TSB 19-2212) for this specific issue. This part number supersedes older versions like AA5Z-9F479-A and 2R3Z-9F479-AA. The Motorcraft service part number may be listed as CX-2619.
  Trusted brands: Motorcraft, Bosch, Delphi, Standard Motor Products (SMP)
  OEM price range: $50-$80
  Aftermarket price range: $40-$60

Related Codes That Often Appear With This One

• P0108 — This code for 'MAP/BARO Circuit High Input' can appear with P0107 due to the same faulty sensor sending erratic signals. The TSB specifically mentions P0107, P0108, and P0109 as related codes for this issue.
• P0109 — This code for 'MAP/BARO Circuit Intermittent' is also caused by the failing sensor providing inconsistent readings. The TSB groups this code with P0107 and P0108.

Technical Service Bulletins (TSBs) & Recalls

• TSB 19-2212 / NHTSA ID 10163568: Addresses an issue on 2018-2019 MKTs with the 3.5L EcoBoost engine where a faulty MAPT sensor can cause a lack of power and trigger DTCs P0107, P0108, and/or P0109. This bulletin supersedes TSB 19-2183.
• TSB 19-2183 / NHTSA ID 10163264: The original bulletin for this issue, later updated by 19-2212. It confirms the same set of vehicles, symptoms, and the root cause being the MAPT sensor.

Platform-Specific Known Issues

• TSB 19-2212 (supersedes 19-2183) was issued by Ford for 2018-2019 Lincoln MKT, Ford Explorer, Ford Flex, and Ford Taurus models with the 3.5L EcoBoost engine. It explicitly states that DTCs P0107, P0108, and/or P0109 accompanied by a lack of power and various warning messages (wrench light, Service AdvanceTrac, Hill Start Assist Not Available) are likely due to a faulty MAPT sensor. The TSB simplifies diagnosis by directing replacement of the sensor if the conditions are met, rather than extensive wiring or vacuum leak testing.

Mechanic-Grade Diagnostic Values

• MAP vs. BARO/TCBP Pressure Differential (KOEO) — expected: The MAP (PRESS) PID value should be within 1.5 psi (10.35 kPa) of the BARO (PRESS) and TCBP (PRESS) PID values.. Failure: A deviation greater than 1.5 psi (10.35 kPa) indicates a faulty MAPT sensor.
• MAP Sensor Signal Voltage (KOEO) — expected: Approximately 4.5V - 5.0V, corresponding to atmospheric pressure.. Failure: A reading below 0.5V - 0.6V will trigger the P0107 code.
• MAP Sensor Reference Voltage — expected: Approximately 5.0V on the reference wire at the connector with KOEO.. Failure: No voltage or low voltage indicates a wiring or PCM issue, not a sensor failure.

Scan Tool Commands That Help

• Ford IDS / FORScan: Live Data / PID Monitoring — Used with Key On, Engine Off to compare the MAP (PRESS), BARO (PRESS), and TCBP (PRESS) PIDs. This is the specific diagnostic test called for by the manufacturer TSB to confirm a faulty sensor.

Wiring & Ground Locations

• MAPT Sensor Connector — On top of the engine's intake manifold, easily visible after removing the plastic engine cover.. This is the primary connection point to inspect for damage, corrosion, or poor pin fitment before replacing the sensor.
• Passenger Compartment Fuse Panel — Under the instrument panel to the left of the steering column.. While a specific fuse for the MAP sensor isn't identified, this panel contains fuses for various PCM and engine sensor circuits.
• Power Distribution Box — In the engine compartment on the driver's side.. This box contains main fuses and relays for the engine management system.

Real Owner Repair Stories

• YouTube channel 'SmashingPunkFan' (2012 Ford F-150 3.5L EcoBoost) — Check engine light with code P0107, 'Service Advance-trac' message appeared when letting off the throttle, cruise control was inoperative.
  ❌ Tried (didn't work) Initially suspected a bad throttle body.
  ✅ What actually fixed it Replacing the Manifold Absolute Pressure (MAP) sensor on the intake manifold fixed all symptoms. The wrench light and AdvanceTrac messages cleared, and cruise control function was restored after clearing the codes.

OEM Part Supersession History

• 2R3Z-9F479-AA, AA5Z-9F479-A → AA5Z-9F479-E — Part revision and improvement by the manufacturer.
• Motorcraft CX-2228 → Motorcraft CX-2619 — Service part number update corresponding to the OEM part number change.
  Heads up: Do not confuse with the Turbocharger Boost Sensor (Part AA5Z-9F479-D / Motorcraft CX-2594), which is also used on the 3.5L EcoBoost but is located on the charge air cooler outlet pipe and is not the cause of this specific TSB-related issue.

Model Year Variations Within This Range

• 2018-2019: The diagnostic procedure in the official TSB was updated. The superseding TSB (19-2212) simplified the process, moving from a comparative PID check to a direct instruction to replace the MAPT sensor if the vehicle presents with the specified DTCs and symptoms.