P006E: Turbocharger/Supercharger Boost Control A Supply Voltage Circuit Low

"Boost control A" is the electrically driven actuator the engine control module uses to set boost pressure, for example a wastegate solenoid, the control valve of variable turbine vanes or an electric actuator. Some engines supply it through two driver stages in the control module: a high side that switches the supply voltage and a low side that switches ground. The low side is covered by P0045 to P0048; this code concerns the high side. P006E is set when the switched supply voltage is too low, typically because the supply wire is shorted to ground or interrupted. Without supply the actuator stays in its rest position, which on most engines means low boost and reduced power.

Medium severity. Can I keep driving?Drive without demanding power and go to a repair shop soon. If you see a lot of blue smoke or hear a metallic noise, shut off the engine.

Symptoms

Check engine light on
Loss of power or reduced power mode
Weak acceleration, noticeable turbo lag

Most likely causes

Supply wire shorted to ground or interrupted
Connector at the actuator corroded or loose
Internal short in the actuator
High-side driver in the engine control module faulty

What to check, in order

Start with the simplest. You can tick off each step.

Check the hoses, clamps, and intercooler
With the connector unplugged, check whether the signal wire is making contact with ground.
Compare commanded and actual pressure in live data
Check the actuator's movement
Check the vacuum hoses and the solenoid valve
Check the oil and the turbo shaft play before replacing it

Good to know

Repair difficulty: medium
It can trigger limp mode.
It affects emissions.

What each character of P006E means

P: Powertrain: engine and transmission
0: Generic code: same on every make
0: Subsystem depends on the code range
6E: Specific fault in that system

Frequently asked questions

Can I keep driving with code P006E?

Drive without demanding power and go to a repair shop soon. If you see a lot of blue smoke or hear a metallic noise, shut off the engine.

What causes code P006E?

The most common causes are: supply wire shorted to ground or interrupted; connector at the actuator corroded or loose; internal short in the actuator.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.