P0107 on the 6.0L Power Stroke is a manifold absolute pressure (MAP) sensor circuit low fault. On the 6.0L this sensor reads boost pressure in the intake and reports it to the PCM, which uses it to control the VGT turbo, fueling, and EGR. When the PCM sees the MAP signal voltage below its normal range, it stores P0107 and can limit boost or power.
The MAP sensor is one of the most important inputs on the 6.0L because the PCM uses it as the feedback signal for controlling the variable geometry turbo. Without a trustworthy boost reading, the PCM cannot position the turbo vanes correctly, so it takes the safe route and limits power. That is why a small sensor or connector problem can feel like a major loss of performance on this engine.
What P0107 means
The MAP sensor sends a voltage that rises with pressure. P0107 sets when that voltage stays too low, indicating the sensor is reading little or no pressure when the PCM expects a valid signal. This is usually an electrical problem in the circuit or a failed sensor, though a completely dead boost condition can also drive the reading low.
Common causes
- Failed MAP/boost sensor
- Open or shorted signal, ground, or reference wire
- Corroded or unplugged sensor connector
- Damaged or oil-fouled sensor from crankcase blow-by
- Loss of 5-volt reference from the PCM
Symptoms
- Check engine light with reduced power or limp mode
- Sluggish acceleration and low boost
- Poor fuel economy
- Erratic turbo behavior
- Companion VGT or boost codes
How to diagnose it
Locate the MAP sensor on the intake and inspect the connector for oil, corrosion, and bent pins, since 6.0L blow-by commonly fouls this sensor. With a scan tool, view the boost pressure reading key on, engine off; it should read near barometric pressure. A reading pinned low points to the sensor or wiring. Check for the 5-volt reference and a good ground at the connector, and verify the signal wire has continuity back to the PCM with no short to ground.
How to fix it
Clean or replace a corroded connector and repair any shorted or open wiring. If the reference and ground are present but the sensor reads low and does not respond to pressure, replace the MAP sensor. Because the 6.0L fouls these sensors with oil, inspect the sensor tip and clean or replace as needed. Clear the code, confirm the sensor reads barometric pressure at key on, and road test to verify boost returns to normal. For a MAP sensor or connector pigtail for your 6.0L, contact sales@coredieselparts.com.
Frequently asked questions
Where is the MAP sensor on a 6.0L Power Stroke?
It is mounted on the intake manifold and reads boost pressure. It is prone to oil fouling from crankcase blow-by, so check the tip and connector when diagnosing P0107.
Will P0107 put my truck in limp mode?
It can. Without a valid boost signal the PCM often limits fueling and turbo control, which shows up as reduced power until the fault is repaired.
Can oil in the connector cause this code?
Yes. Oil migrating up the harness from blow-by corrodes and bridges the pins, dragging the signal low and setting P0107. Clean the connector and reseal it during the repair.
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