Having problems with loss of power, limp mode, boost pressure faults or an engine warning light?
Freestorm tests and repairs electronic turbo actuators for many vehicle makes and models.
If your car has poor acceleration, intermittent power loss, turbo boost fault codes, glow plug light flashing or turbo actuator faults that keep coming back, send us your vehicle details and we’ll help check the best repair option.
Testing and repair for common electronic turbo actuator faults
Send us your diagnostic codes, symptoms and part number before booking
A repair may save the cost of a new turbo or actuator
Typical turnaround from receipt of the unit
We help with part numbers, booking, delivery and updates
A turbo actuator controls the movement of the turbocharger vanes or wastegate, depending on the turbo type. Its job is to help control boost pressure so the engine gets the right amount of air.
On many modern diesel and petrol engines, the turbo actuator is electronic. It can include a motor, position sensor, gears and internal electronics. The engine ECU commands the actuator to move, and the actuator reports its position back to the ECU.
When the turbo actuator fails, the turbo may not control boost correctly. The car may lose power, go into limp mode, show boost pressure fault codes or bring on the engine management light.
A faulty turbo actuator can affect engine power and boost control. The car may still drive, but it can feel weak, slow or restricted.
In some cases, the fault is intermittent at first. The car may drive normally one day and then suddenly lose power or go into limp mode the next. If the fault gets worse, power loss may become permanent.
Turbo actuator faults can also be confusing because the same symptoms can be caused by other problems, such as vacuum leaks, boost leaks, sticking turbo vanes, wiring faults, MAP sensor faults, EGR problems, DPF issues or turbocharger wear.
That is why it is better to test the actuator instead of replacing the turbo or other parts by guesswork.
Best when:
The original electronic turbo actuator can be tested and repaired
Benefits:
Best when:
The original actuator is badly damaged, broken, burned, heavily corroded, water-damaged or not suitable for repair
Benefits:
In many cases, testing the original actuator is the best first step. If the actuator is too damaged to repair, we’ll let you know.
Turbo actuator faults can show up in different ways. The fault may be constant or it may come and go.
The car feels weak, slow or restricted when accelerating
The engine limits power to protect the vehicle when it detects a boost control fault
The check engine light or engine warning message may appear on the dashboard
On some diesel vehicles, a flashing glow plug light can appear with turbo actuator or boost control faults
The car may hesitate, feel flat or fail to pull properly under load
The car may drive normally sometimes, then suddenly lose power
Diagnostics may show actuator position, boost pressure or turbo control faults
The engine is not seeing enough boost pressure compared with what the ECU requested
The turbo may overboost if the actuator or turbo mechanism is not controlling pressure correctly
The fault code may clear for a short time but come back after driving
Fault codes depend on the vehicle, engine and diagnostic tool. These are common examples only. They should not be used as a final diagnosis without testing.
The engine is not seeing the expected boost performance. This can be linked to the turbo actuator, boost leaks, turbo vanes, sensors or other boost control issues
The ECU is seeing a boost control or actuator control signal outside the expected range
Can point to actuator control, wiring, connector or internal actuator faults
The turbo is producing more boost than expected. This may be linked to actuator control or sticking turbo vanes
The engine is not producing enough boost. This may be caused by actuator faults, boost leaks, turbo wear, vacuum faults or sensor issues
Commonly seen on some Ford diesel applications with turbo actuator problems
Can appear on some Volkswagen / Touareg applications with turbo control module or actuator faults
Some diagnostic tools may show manufacturer-specific boost pressure or charge air pressure control faults
The actuator may not be reaching or reporting the position requested by the ECU
Before sending the unit, please collect as much information as you can. This helps us check the fault faster and avoid delays.
This depends on the vehicle and the turbo actuator type.
Some electronic turbo actuators need to be set up, calibrated or checked with diagnostics after they are refitted. The actuator also needs to move correctly with the turbo mechanism, otherwise the same fault may return.
Repairing the original actuator can often make the refit simpler, but the turbo system should still be checked after installation.
Freestorm handles the turbo actuator testing and repair process from start to finish. We check the details, review the fault information, confirm the next steps and keep you updated.
Typical repair time: 5-10 working days from receipt of unit.
Typical turnaround is approximately 5-10 working days from receipt of the unit.
This can depend on the fault, testing time, repair work required, parts availability and courier times. We’ll update you if extra time is needed.
Fill in the booking form with your vehicle, part number and fault details
We confirm what to send and provide delivery instructions. Pack the unit securely and include your booking details
Your turbo actuator is tested and repaired where suitable. If repair is not suitable, we’ll advise you
Your unit is returned with repair notes and warranty information
Freestorm can help with ABS faults across many common vehicle makes and models.
Audi
BMW
Ford
Mercedes-Benz
Volkswagen
Peugeot
Chery
Toyota
Volvo
Typical turnaround is approximately 5-10 working days from receipt of the unit, depending on the fault and repair requirements.
This depends on the vehicle and actuator type. In many cases, the turbo actuator can be removed and sent separately. Send us a photo of the actuator and part number and we’ll confirm what is required.
We can often advise from the fault codes, symptoms and part number, but final confirmation may require testing.
Warranty depends on the part type and repair carried out. We will confirm the applicable warranty before or after assessment.
Please send the vehicle make, model, year, engine size, fuel type, registration/VIN if available, part number, fault codes and symptoms.
Yes. If the ECU cannot control boost pressure correctly, the car may go into limp mode and limit power.
No. Loss of power can also be caused by boost leaks, vacuum faults, MAP sensor issues, EGR faults, DPF blockage, wiring faults, sticking turbo vanes or mechanical turbo damage.
Yes, on some diesel vehicles a turbo actuator or boost control fault can trigger a flashing glow plug light.
Some actuators may need setup, calibration or diagnostic checks after refitting. This depends on the vehicle and actuator type.
Sometimes, but used actuators can have compatibility issues or existing wear. The actuator also needs to match and move correctly with the turbo. Testing the original unit is often the better first step.
Send us your vehicle details, part number, fault codes or symptoms and we’ll help check whether turbo actuator testing and repair is the right option.