DTC Delete & DTC Off
Off-road, export & motorsport vehicles only
DTC off means permanently removing a specific diagnostic trouble code so a dash light stays off, but only ever after the real fault is fixed, or on a genuine off-road or motorsport build. It is not a way to hide a problem, defeat emissions or sneak a car through an MOT, and we will not use it that way.
The legal bit (we'll be quick)
Deleting your DPF, EGR, AdBlue and their mates is strictly off-road, export and motorsport territory. On a road car it's an instant MOT fail and the emissions police won't see the funny side — so keeping it road-legal is on you, not us. Road car just being a diva? Scroll down, we'll sort it the proper way. Still under manufacturer warranty? Fair warning — this'll almost certainly wave it goodbye, so weigh that up first.
Off-road, export & motorsport only. On a road car a DPF/EGR delete is an instant MOT fail, so keeping it legal is on you — and it'll void any manufacturer warranty. Road car? We'll fix it the proper way instead.
What it is
A DTC, or Diagnostic Trouble Code, is the ECU's way of logging that a sensor or system has read outside its expected range, usually lighting a warning lamp and sometimes triggering limp mode. It is a diagnostic tool that exists so faults get noticed and fixed, and on a healthy vehicle codes appear for a reason. Permanently disabling a code stops the ECU from flagging that particular condition, which is only appropriate once the underlying issue is genuinely resolved or on a vehicle that has legitimately been modified for off-road use.
Why owners of off-road builds consider it
The legitimate cases are narrow. On an off-road or motorsport build where a component has been legitimately removed or changed, its now-irrelevant code can nag permanently and is reasonably switched off. Occasionally a fault has been fully and correctly repaired but a stubborn stored code or an obsolete monitor keeps a light on. Outside those situations there is no good reason to delete a DTC, and we never touch codes relating to safety systems such as brakes, airbags, ABS or steering, nor codes being used to mask an emissions fault to pass a test.
Signs yours may be failing or blocked
How we do it
We diagnose first, always. We find out why the code is there, and if it points to a live fault we fix that fault rather than deleting the warning, because a light exists to tell you something. Only once the underlying issue is genuinely resolved, or on a legitimate off-road or motorsport vehicle, will we disable a specific DTC at ECU/software level with dealer-grade tools, and we back up your original file first. We will not remove codes for safety-critical systems, and we will not delete emissions-related codes to help a road car cheat an MOT. It is the owner's responsibility to ensure the vehicle's use is lawful.
Road car? We've still got you (legally)
If it genuinely lives on the road, we're not about to yank your emissions kit out and gift you an MOT fail. We fix the thing that's actually winding you up: blocked DPF? We clean it, force a regen, swap the duff sensor and work out why it clogged so it doesn't pull the same stunt next month. Same happy ending — a car that runs right — minus the awkward chat at the test station.
DTC Delete — the questions
Can you just turn off my warning light?
Not blindly, no. A DTC is there to tell you something, so we diagnose it first. If there is a live fault we fix the fault, which is what actually turns the light off for good. Masking a genuine problem is not something we do.
Is deleting a DTC legal, and will it affect my MOT?
It depends entirely on the code and the vehicle. Removing an emissions-related code to get a road car through an MOT is not legal and we will not do it. Disabling a redundant code after a proper repair, or on a genuine off-road or motorsport build, is different, and the owner is responsible for ensuring the vehicle's use is lawful.
Will you switch off an airbag, ABS or brake fault code?
No. We do not delete codes for safety-critical systems under any circumstances. Those faults need diagnosing and repairing, and hiding them would be dangerous. We will help you find and fix the cause instead.
The fault is genuinely fixed but the light stays on. Can you help?
Yes. Once we have verified the repair is sound, we can clear a stubborn stored code or disable an obsolete monitor at software level, backing up your original file first, so the dash reflects the car's real, healthy state.
Off-road or export build?
Tell us the vehicle and how it's used and we'll advise honestly.
Related solutions
Done properly
Software handled with genuine dealer-level tools on a stable power supply, your original file backed up first — fully reversible.
Off-road, export or motorsport vehicle?
Tell us the vehicle and how it's used — we'll give you an honest steer, road-legal or not.
Mobile across Kent & the South East