DTC off

A fault code is not an isolated message: it is the end of a monitor. The ECU constantly compares a measured value against a model — expected air mass, plausible sensor voltage, actual actuator position — and when the gap lasts long enough over enough cycles, it stores the code, lights the MIL and, depending on severity, cuts torque or disables functions.

Our job is to disable exactly the monitors you name, and their consequences: storage, warning light, torque derate, no-start when it is tied to them. Everything else in the diagnostics keeps working — that is what separates a targeted delete from a file where half the OBD has been switched off. A code tied to hardware that is still fitted remains a poor candidate: if it shows up, it has something to say.

A fault code is not the failure: it is the report of it. Disabling a monitor on hardware that is still fitted amounts to cutting the oil pressure light instead of checking the level. And there is a line we do not cross: codes tied to braking, airbags and steering stay active, whatever reason is given.

A "DTC off software" is a tool you install: you load the file into it, you tick codes, it writes a file. It works on the references it knows, without looking at the rest of your calibration, and answers for nothing if the code comes back. You are buying a licence, and the work stays with you.

Here you are not buying a tool: you are opening a job. An engineer opens your read, disables the monitors you listed on that precise reference, corrects the checksums and returns a dated file, linked to your account and downloadable again. If a code comes back, you reopen the job with the engineer who handled it instead of waiting for a vendor's next update.