Faulty manifold absolute pressure sensor or its electrical connector; Leaking or disconnected charge air cooler piping or intake hose between the turbocharger and intake manifold; Restricted or clogged air filter or intake tract; Malfunctioning turbocharger wastegate or supercharger bypass valve; Exhaust leak before the turbocharger affecting boost pressure; Faulty barometric pressure sensor or mass airflow sensor providing incorrect reference data; Wiring damage or corrosion in the MAP sensor circuit

DTC codes / P00xx · Fuel and air metering and auxiliary emission controls / P006C

P006CMAP - Turbocharger/Supercharger Inlet Pressure Correlation

Q: What does code P006C mean?

MAP - Turbocharger/Supercharger Inlet Pressure Correlation. P006C indicates that the powertrain control module has detected a disagreement between the manifold absolute pressure sensor reading and the expected turbocharger or supercharger inlet pressure under specific operating conditions. The computer compares the MAP signal against a modeled value derived from other sensors such as the barometric pressure, mass airflow, and throttle position, and sets this code when the correlation falls outside the calibrated range.

P006C indicates that the powertrain control module has detected a disagreement between the manifold absolute pressure sensor reading and the expected turbocharger or supercharger inlet pressure under specific operating conditions. The computer compares the MAP signal against a modeled value derived from other sensors such as the barometric pressure, mass airflow, and throttle position, and sets this code when the correlation falls outside the calibrated range.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering and auxiliary emission controls

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Reduced engine performance or a lack of boost from the turbocharger or supercharger
Rough idle or stumbling during acceleration
Poor fuel economy or increased fuel consumption
Hesitation or delayed throttle response when accelerating
In rare cases, the engine may enter limp mode to protect the turbocharger

Common causes, most likely first

Faulty manifold absolute pressure sensor or its electrical connector
Leaking or disconnected charge air cooler piping or intake hose between the turbocharger and intake manifold
Restricted or clogged air filter or intake tract
Malfunctioning turbocharger wastegate or supercharger bypass valve
Exhaust leak before the turbocharger affecting boost pressure
Faulty barometric pressure sensor or mass airflow sensor providing incorrect reference data
Wiring damage or corrosion in the MAP sensor circuit

How to diagnose and fix it

Inspect all intake and charge air hoses for cracks, loose clamps, or disconnections and repair as needed
Check the air filter and intake tract for restrictions and replace the filter if dirty
Test the MAP sensor with a scan tool to compare its live reading against expected values and a known-good sensor
Verify the MAP sensor connector and wiring for corrosion, chafing, or loose pins and repair the harness
Check the turbocharger wastegate or supercharger bypass valve for proper operation and freedom of movement
Perform a smoke test on the intake system to locate any hidden leaks
If all else checks out, reprogram or replace the powertrain control module as a last resort

What the MAP correlation code really means

A dirty or failing mass airflow sensor can skew the modeled pressure calculation and trigger P006C even when the MAP sensor itself is perfectly functional.
Small intake leaks after the turbocharger often cause this code without any audible whistle, so a smoke test is more reliable than a visual inspection.
The code can be set by a sticking turbocharger wastegate that prevents the expected pressure rise, which many technicians overlook while focusing on sensors.
P006C is sometimes stored intermittently due to a poor electrical connection at the MAP sensor, so always wiggle-test the harness while watching live data.
Replacing the MAP sensor without checking the charge air system for leaks is a common misdiagnosis that leads to a repeat repair.

Can I keep driving with P006C?

You can usually continue driving to a repair shop, but avoid heavy acceleration and sustained high-speed driving because incorrect boost pressure can stress the turbocharger. If the engine enters limp mode or performance drops severely, pull over and arrange a tow to prevent further damage.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.