TVA Off – disabling the throttle valve actuator in the ECU software
Software deactivation of the control and monitoring of the throttle valve actuator (TVA Off) on diesel engines in the engine control unit.
The modification disables the actuator control and the related fault codes after its removal or in the case of a fault that the workshop solves mechanically. The file is prepared for the exact software version.
Requests are submitted from a DR-files account. If you are not signed in, you will be asked to sign in or register first. The selected service is kept.
Service details
On diesel engines the throttle valve mainly serves EGR regulation and a smooth engine shut-off. Whether disabling it is appropriate depends on the vehicle configuration and its use; state the reason and the condition of the vehicle in the request.
Required information
- Vehicle manufacturer, model, year and engine code
- ECU manufacturer, hardware and software number (if known)
- Complete original file read from the control unit, the tool and the read method used
- Condition of the actuator (removed, blanked, faulty) and the reported fault codes
Typical workflow
- 01Choose the service and enter the vehicle and control unit details.
- 02Upload the original file.
- 03Fixed prices are charged from your credits when you submit; other prices are confirmed in the request and charged when you accept them.
- 04The file is prepared and delivered in your account.
Technical notes
- The fixed price in credits is deducted when the request is submitted. The file is prepared for the exact software version and checked before delivery.
- If the request is connected with an EGR or other emission-related modification, it is treated as an emission request, which is prepared only for non-road vehicles.
Frequently asked questions
What does the throttle valve actuator do on a diesel engine?
It regulates the intake air for correct EGR operation and provides a smooth engine shut-off. When it fails or is removed, the ECU reports fault codes; the TVA Off modification disables them.
What is needed for the request?
The complete original file read from the control unit, the hardware and software number and a description of the required function. You select the service when uploading the file and see the price in credits before submitting.
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