MAP-Turbo Inlet Pressure Correlation Fault
The P006C code indicates that the Engine Control Module (ECM) has detected a discrepancy between the Manifold Absolute Pressure (MAP) sensor reading and the expected pressure at the turbocharger or supercharger inlet. This correlation fault suggests that the actual inlet pressure does not match the calculated value based on other sensor inputs, such as the Mass Air Flow (MAF) sensor and throttle position. Common causes include a faulty MAP sensor, a restricted or leaking intake system, a malfunctioning turbocharger wastegate or bypass valve, or wiring issues. This can lead to reduced engine performance and potential drivability concerns.
01. Most Common Causes
- Faulty MAP sensor
- Intake air leak or restriction
- Malfunctioning turbocharger wastegate or bypass valve
- Wiring or connector issues in MAP sensor circuit
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or hesitation
- Poor fuel economy
- Rough idle or stalling
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect intake system for leaks, cracks, or loose connections.
Step 3: Test MAP sensor voltage and compare to expected values using a scan tool.
Step 4: Check turbocharger/supercharger inlet pressure with a manual gauge.
Step 5: Inspect wiring and connectors for damage or corrosion.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as reduced engine power and potential stalling can occur. Immediate diagnosis is advised.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150. Repair costs vary: a MAP sensor replacement is $100-$200, while intake leak repairs can range from $150-$500.