TVA Off - Throttle Valve Actuator Deactivation
Deactivates the intake throttle/anti-shudder valve that works with the EGR system and tends to fail.
The TVA (Throttle Valve Actuator), also known as the intake or anti-shudder flap, works with the EGR system to create intake vacuum and to give a smooth engine shut-down.
It is common on VAG, BMW and Mercedes diesels, and over time it carbons up, sticks and fails. The typical symptoms are power loss, rough running and a check-engine light, and the part itself is expensive to replace.
TVA Off deactivates the TVA position sensors, its control loops and the related fault codes in the ECU. Applied together with EGR Off, the intake stays cleaner and the TVA-related problems disappear, which avoids a costly part replacement.
It is offered mainly for the VAG group and BMW, where the fault is most often seen. As it forms part of an emissions-related intake change, TVA Off is intended for off-road, motorsport or export use and may not be legal for road use in many countries, so the owner should check local regulations.
Advantages & Features
- Removes TVA failure risk
- Stops TVA-related carbon problems
- Optimised together with EGR Off
- Prevents TVA-driven power loss
- Avoids costly TVA replacement
- Fully reversible to stock
Related solutions
Price
Paid with credits from your account balance. The credit amount for your ECU is shown after the file is analysed, before you confirm. See credit packages
Frequently Asked Questions
What does TVA Off do?
It disables the intake throttle / anti-shudder valve actuator in the ECU, so a failed or removed valve no longer causes fault codes, limp mode or rough running.
When is TVA Off useful?
When the throttle valve actuator fails (a common fault on diesel engines) and the owner prefers to blank it rather than replace it, often together with EGR Off.
Which file do I need to upload?
A full read of the original ECU file. Select EGR Off or DPF Off in the same upload if needed.
How long does TVA Off take?
Typically 10-45 minutes when prepared by a tuner.
Is TVA Off reversible?
Yes, by flashing the original file back.
Does TVA Off affect engine shutdown or emissions?
On some engines the valve smooths shutdown; a slight shudder on switch-off is possible. Because the valve works with the EGR system, the file is intended for off-road use.