DTC Off - Fault Code Deactivation
Permanently disable specific diagnostic trouble codes so the check-engine light stops appearing.
A DTC (Diagnostic Trouble Code) is a fault the ECU stores when a sensor reports something outside its expected range, and some of those codes light the check-engine lamp.
After hardware changes such as a decat, a sports exhaust or an EGR or DPF removal, the ECU can log codes for equipment it no longer detects. The dashboard warning appears even though the car runs correctly, which makes a genuine fault harder to spot.
DTC Off disables the chosen codes in the ECU so the warning light stays off. Only nuisance codes are turned off; safety-critical codes for systems such as the airbags, ABS and ESP are deliberately left active.
It is the natural companion to the various off solutions, keeping the dashboard and diagnostics clean after a modification. The change is prepared for your exact ECU and is fully reversible to stock.
Advantages & Features
- Turns off the check-engine light
- Removes nuisance fault codes after modifications
- Keeps safety-critical codes active
- Cleaner dashboard and diagnostics
- Ideal alongside decat, EGR or DPF off
- 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 DTC Off do?
It permanently disables specific diagnostic trouble codes in the ECU so a known, intended change (removed sensor, deleted component, aftermarket part) no longer triggers the check-engine light or limp mode.
Which codes can be disabled?
Most emission, sensor and plausibility codes (P-codes). You list the exact codes in the upload note; we disable only those, not the whole diagnostic system.
Which file do I need to upload?
A full read of the original ECU file and the list of DTCs to disable, ideally from a diagnostic scan.
How long does DTC Off take?
Typically 10-45 minutes once a tuner has the ticket.
Is DTC Off reversible?
Yes. Flashing the original file back restores all codes.
Should I disable a code instead of fixing the fault?
No. DTC Off is for codes caused by an intentional modification, not for hiding a mechanical or safety problem. Emission-related codes may also affect inspection and road legality.