DTC off for the fault codes you specify
A diagnostic trouble code is the control unit's record of a fault it believes it has found. DTC off tells the calibration to stop setting particular codes — the job you need when a component has been taken off a race or off-road car and the engine computer keeps reporting its absence. You list the codes; exactly those are changed and nothing else.
For professional and motorsport use where permitted by local law. Removing or disabling emissions equipment on a vehicle used on public roads is not permitted in most countries — check the rules that apply to you before ordering.
- Only the codes you list are changed
- Applied to your own ECU read
- Checksum-corrected and flash-ready
- About a minute, from €49.95
What DTC off changes
Every monitored system has a check behind it: a sensor reading out of range, a component that does not respond, a value that does not agree with another. When a check fails, the control unit stores a code — P0401 for insufficient EGR flow, for example — and usually lights the engine warning lamp. DTC off, DTC delete and fault code removal all mean the same thing: switching off the reporting for chosen codes, so that check no longer produces a stored fault.
It is narrow by design. The codes you name are changed; every other monitor in the calibration keeps working exactly as before, which is what you want on a car whose remaining systems still need to tell you when something is wrong.
It only reaches codes the engine control unit sets itself. The ABS unit, the airbag module and the gearbox controller keep their own fault memories in their own hardware, and an engine file does not touch them.
When it is the right tool — and when it is not
The legitimate case is a component that is no longer there by design: a sensor removed with the hardware it served, an emissions part taken off a competition engine, a system a race car simply does not carry. The control unit has no way to know that was deliberate, so it keeps logging the absence.
It is not a repair. A code pointing at a genuine fault on a component that is still fitted and still meant to work is information you need, and switching it off only removes the warning while the fault stays. If that is the situation, fix the part.
Telling us which codes
Tick DTC on the order and a field for the codes appears directly underneath it. It is required: the order cannot go through without the codes, because DTC off without a list has nothing to change.
Read the stored codes with any diagnostic scanner before you order, and enter them in the form they are shown, for example P0401 or P2463.
How it works at StageGen
You supply the read from your own control unit and the listed codes are switched off in that file. The result comes back with every checksum recalculated — the step that decides whether the unit accepts the write at all.
- Upload the original read from your control unit
- Tick DTC and enter the codes, plus anything else you need
- Download the checksum-corrected file and flash it
Ordering it with other changes
The fault codes tied to a delete are handled as part of that delete — an EGR off file does not need a separate DTC order for the EGR monitors. DTC off is for the codes you want changed on top of that.
- EGR off, DPF delete or AdBlue/SCR off in the same file
- Swirl flaps or start & stop changes
- A Stage 1 or Stage 2 calibration
Which control units are covered
The platform covers the control units that make up the bulk of the European parc, petrol and diesel.
- Bosch EDC15, EDC16, EDC17 (including C74 and C76)
- Bosch ME7, MED9, MED17, MEVD17, MG1 and MD1
- Siemens/Continental SID, SIMOS, MSD and PCR families
- Delphi DCM, Marelli MJD and IAW, Denso
Reads from slave tools
An encrypted slave read cannot be edited as it stands. Have your master tuner decrypt it, upload the decrypted file here, and return the result to them to be encrypted for your device. Master reads — .bin, .ori, .mpc and the other common formats — upload as they are.
Turnaround and pricing
A file tuning job is €49.95. DTC off shares that file with whatever else you pick on the same upload, and processing is automatic, around the clock — most files are back in under a minute.
If the read cannot be matched automatically, manual processing is available and the file is handled by hand.