DTC-OFF – Disclaimer and liability waiver

This section answers frequently asked questions regarding the electronic disabling of error codes (Diagnostic Trouble Codes). It must be read carefully before any intervention request.

What is “DTC OFF”?

DTC OFF is a modification of your engine control unit (ECU) software. It consists of instructing the onboard computer to ignore a specific error.

Immediate result: the engine warning light turns off and the fault code disappears from the diagnostic tool. However, additional messages (faults on the dashboard, other warning lights than the engine light) may still persist.

Reality: the faulty component is still broken. DTC OFF is a masking, not a repair.

Why is this a risky practice?

The ECU uses fault codes to protect your engine. By requesting a DTC OFF, you are removing a “fire alarm”:

Loss of protection: if you suppress a fault related to the turbo or injection system, the engine may no longer enter “limp mode” to protect itself. This can lead to sudden and severe engine failure.

Domino effect: an unrepaired faulty component will eventually damage another system (e.g., a clogged EGR valve that ends up blocking the DPF). In addition, removing a DTC can trigger other fault codes in a cascade effect.

Technical inspection: inspection centers are increasingly equipped to detect software modifications. A masked vehicle may be automatically rejected.

Do you guarantee the intervention?

No. The removal of a fault code is a purely software-based service.
We guarantee that the requested code will be removed from the software, but we do not under any circumstances guarantee the mechanical health of the vehicle afterward. If the engine fails due to a problem that you chose not to repair, we cannot be held responsible.