Technical Description of OBD-II Trouble Code
The supply voltage circuit for Turbocharger/Supercharger Boost Control is too low.
What does that mean?
This is a generic diagnostic trouble code (DTC) that applies to OBD-II vehicles, including Chevy (Chevrolet), GMC (Duramax), Dodge, Ram (Cummins), Isuzu, Ford, Vauxhall, VW, and others. The exact repair steps may vary depending on the year, make, model, and powertrain configuration.
Turbochargers, superchargers, and other forced induction systems use energy from the engine (such as exhaust pulses or belt-driven screw-type mechanisms) to increase the amount of air entering the combustion chamber, improving volumetric efficiency.
In forced induction systems, intake pressures need to vary and be adjusted according to the operator’s power needs. Manufacturers use a boost control valve (also known as a waste-gate or boost control solenoid) to regulate the air/fuel mixture and ensure stoichiometric conditions. This valve is monitored and controlled by the ECM (Engine Control Module) and adjusts the vanes in the charger to control the amount of boost. A problem with the boost control component can cause drivability issues, and the ECM may put the vehicle into “limp” mode to prevent engine damage from over/under-boost conditions.
The letter “A” in this context may refer to a connector, wire, circuit group, or other component. Consult the manufacturer’s specifications for more information.
The ECM triggers the check engine light (CEL) and displays the P006E code when it detects a fault in the boost control system. This code is activated when the ECM detects a lower than desired electrical value in the “A” boost control supply voltage circuit.
A turbocharger and related components:
What is the severity of this DTC?
The severity is moderate-high. A problem in the forced induction system can alter the air/fuel ratio, potentially causing significant engine damage if ignored. It can also result in poor fuel mileage. It is important to repair any faults in the forced induction system to avoid these issues.
What are some of the symptoms of the code?
Symptoms of a P006E trouble code may include:
What are some of the common causes of the code?
Possible causes for the P006E code include:
What are some P006E troubleshooting steps?
Basic Step #1
It is important to note that forced induction systems generate a dangerous amount of heat and can cause severe burns if the engine is cool and unprotected. Visually locate the boost control solenoid, which is typically mounted directly to the charger. Ensure that its mechanical functionality is working properly, as it controls the charger and boost pressures. If possible, manually move the lever from the solenoid to the charger housing to check for proper movement. However, be cautious as some systems may not allow manual movement.
Basic Step #2
In some cases, the solenoids may have adjustable levers to find the optimal position. Research the specific manufacturer’s instructions for adjusting the lever.
NOTE: Be careful not to damage expensive charger components during this step.
Basic Step #3
If your setup includes a module mounted directly to the boost control, check for signs of water intrusion. Any corrosion, water damage, or other signs of damage may require replacing the assembly or module.
Basic Step #4
Inspect the harnesses going to the boost control solenoid, as they are exposed to high levels of heat. Heat damage is often evident early in the troubleshooting process.
