P006E — Turbocharger/Supercharger Boost Control “A” Supply Voltage Circuit Low #

Note: The definition of this Diagnostic Trouble Code (DTC) may vary depending on the vehicle manufacturer.

Common alternate definitions for P006E:

• Boost Pressure Control “A” Supply Voltage Circuit Low (Ford, GM, FCA)
• Supercharger/Turbocharger Boost Control Circuit Low Input (BMW, Mercedes-Benz)
• Turbocharger Control Module Voltage Too Low (Volkswagen, Audi)

Summary of DTC P006E #

The P006E code signals that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected a low voltage condition in the supply circuit for the Turbocharger or Supercharger Boost Control “A”. This circuit supplies power to the actuator or solenoid responsible for regulating turbo or supercharger boost pressure. The “A” designation typically refers to the primary boost control device in systems with multiple controllers. When this supply voltage drops below a threshold set by the OEM, the ECM recognizes a potential fault, which could impact engine performance and emissions. As a result, the check engine light is illuminated to alert the driver or technician of the issue.

Common Symptoms for Trouble Code P006E #

A P006E code can present a range of symptoms, many of which affect engine power delivery and drivability. While some drivers might notice immediate performance issues, others may only see the check engine light without clear indicators. Here are the most common symptoms:

• Illuminated Check Engine Light
• Noticeable loss of engine power, especially during acceleration
• Poor throttle response or laggy acceleration
• Reduced or inconsistent turbo/supercharger boost pressure
• Engine operating in “limp mode” (reduced power to protect engine)
• Increased fuel consumption
• Possible engine misfires or rough running (less common)

Probable Causes for Trouble Code P006E #

The P006E code is most often triggered by electrical or electronic issues affecting the boost control supply circuit. Mechanical faults are less common but possible. Below are the most frequent root causes, ordered by likelihood:

1. Faulty or corroded wiring/connectors in the boost control “A” supply voltage circuit
2. Defective boost control solenoid or actuator (stuck, shorted, or open circuit)
3. Blown fuse related to the boost control supply circuit
4. Weak battery or poor charging system (low system voltage)
5. Faulty ECM/PCM (rare, but possible if other causes are ruled out)
6. Water or oil intrusion in harness or connectors

Step-by-Step Diagnostic for Code P006E #

A systematic approach helps pinpoint the root cause efficiently. Always follow OEM (Original Equipment Manufacturer) repair information where available. Here is a proven step-by-step method:

1. Scan for additional codes. Address related codes (especially power supply or sensor codes) first.
2. Inspect wiring and connectors at the turbo/supercharger boost control actuator/solenoid for visible damage, corrosion, or loose connections.
3. Test circuit voltage using a multimeter at the actuator/solenoid connector. Compare to battery voltage with ignition ON.
4. Check for blown fuse(s) in the fuse box supplying the boost control circuit.
5. Test the actuator/solenoid resistance with an ohmmeter; refer to OEM specs for acceptable range.
6. Wiggle test the harness while monitoring voltage to identify intermittent issues.
7. Check battery voltage and charging system health.
8. If all tests pass, consider a possible ECM/PCM failure; consult OEM service procedures for further tests.

Possible Repairs for Code P006E #

After diagnosing the source of the low supply voltage, appropriate repairs can restore proper boost control operation. Typical solutions include:

• Repair or replace damaged wiring or connectors in the boost control supply circuit
• Replace faulty boost control solenoid or actuator
• Replace blown fuse(s) and inspect for underlying causes
• Clean and secure all electrical connections related to the circuit
• Repair charging system or battery issues if system voltage is low
• Replace ECM/PCM only if conclusively proven faulty (rare)

Is It Safe To Drive With Code P006E? #

Limited: While it may be physically possible to drive with a P006E code, it is not recommended for extended periods. The engine may enter a reduced-power “limp mode” to protect itself, resulting in poor acceleration and drivability. In rare cases, continued driving could lead to further damage or unsafe conditions, especially if boost pressure is uncontrolled. Prompt diagnosis and repair are advised to restore normal performance and avoid additional problems.

Vehicles Most Commonly Affected by Code P006E #

P006E is most often seen in modern vehicles equipped with electronically controlled turbochargers or superchargers. It is reported across various brands, particularly on models using advanced boost control systems. Vehicles frequently affected include:

• Ford F-Series, Focus, and Escape (EcoBoost engines)
• Chevrolet Silverado, Cruze, and Malibu (turbocharged models)
• Volkswagen Golf, Jetta, and Passat (TSI engines)
• Audi A3, A4, and Q5 (TFSI engines)
• BMW 3-Series and X1/X3 (turbocharged)
• Mercedes-Benz C-Class and E-Class (turbocharged)
• Chrysler/Dodge Jeep models with turbo or supercharged engines

Common Mistakes & Best Practices for P006E #

Misdiagnosis can lead to wasted time and unnecessary parts replacement. Avoid these pitfalls by following sound diagnostic practices:

• Overlooking wiring and connector issues—these are more common than failed actuators or ECMs
• Replacing the actuator/solenoid without testing the circuit voltage and resistance
• Ignoring related DTCs that could indicate a broader electrical problem
• Skipping battery and charging system checks
• Not consulting OEM wiring diagrams and repair procedures

Express FAQ: P006E #

Q: Can a weak battery cause P006E?
A: Yes, a weak battery or low charging system voltage can trigger P006E by causing the supply voltage to the boost control circuit to drop below the required threshold.

Q: Do I have to replace the turbo or supercharger if I get this code?
A: Not necessarily. P006E often points to an electrical issue—such as wiring, connectors, or the boost control solenoid—rather than a failed turbo or supercharger assembly itself. Accurate diagnosis is key.