Damaged, chafed or corroded wiring in the boost control supply circuit; Poor connection or corrosion at the boost control actuator, solenoid or relay connector; Blown fuse or faulty relay feeding the boost control circuit; Low battery voltage or weak charging system; Faulty boost control actuator or solenoid drawing excess current or shorting internally; Poor earth connection affecting the circuit; Fault inside the engine control unit driver circuit or outdated software known to affect this circuit.

P006E

Turbocharger/Supercharger Boost Control A Supply Voltage Circuit Low.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
0: AreaFuel and air metering, auxiliary emission controls
6E: FaultThe specific fault in that area

What it means

P006E is a generic powertrain code meaning the engine control unit has detected a low voltage in the supply circuit feeding turbocharger or supercharger boost control 'A'. The control unit monitors the power feed to the boost control actuator or its driver, and sets the code when the voltage is lower than expected. What 'A' refers to, and how the supply is arranged, depends on the model and engine.

Symptoms

Engine warning light on
Loss of power or reduced boost
Car going into limp mode
Poor or hesitant acceleration
Whistling, fluttering or no turbo noise under load
Possible other boost or actuator codes stored alongside

Possible causes

Damaged, chafed or corroded wiring in the boost control supply circuitlikely
Poor connection or corrosion at the boost control actuator, solenoid or relay connectorlikely
Blown fuse or faulty relay feeding the boost control circuitpossible
Low battery voltage or weak charging systempossible
Faulty boost control actuator or solenoid drawing excess current or shorting internallypossible
Poor earth connection affecting the circuitpossible
Fault inside the engine control unit driver circuit or outdated software known to affect this circuitrare

How to diagnose

Read the stored codes and freeze frame data, noting battery voltage, engine load and speed when the fault set, and check for related boost or actuator codes
Test the battery and charging voltage to rule out a general low-voltage problem
Check the relevant fuse and relay for the boost control circuit, using the wiring diagram for the specific model and engine
Visually inspect the wiring and connectors to the boost control actuator or solenoid for chafing, heat damage, water ingress and corrosion
Check the actuator connector pins for tightness, green or white corrosion and push-out terminals
With the ignition on, measure the supply voltage at the actuator connector against the wiring diagram, and voltage-drop test the supply and earth under load
Check the wiring for continuity and short to earth between the actuator and control unit
Test the actuator resistance or operation to the manufacturer's specification, and check for any applicable software updates for the model

How to fix

Repair or replace damaged wiring and terminals in the supply circuit
Clean, secure or replace corroded or loose connectors
Replace a blown fuse only after finding why it failed, or replace a faulty relay
Charge or replace a weak battery and repair any charging system fault
Replace the boost control actuator or solenoid if it is shorted or out of specification
Update the control unit software or repair the unit only if a fault in it is confirmed

Can I keep driving?

Medium severity

The car can usually be driven carefully for a short time, but expect reduced power and possible limp mode. Get it checked soon, as prolonged driving with uncontrolled boost can cause further problems.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.