Map Decoder

Automatic DTC Removal

A DTC (Diagnostic Trouble Code) is logged by the ECU when it detects a fault. After a modification such as EGR or DPF off, related codes can appear. Map Decoder removes the specific DTCs automatically and corrects the checksums.

Talk to Us DTC Manager
How it works

Targeted, validated DTC removal

Select codes

Use the DTC manager to bulk-select and filter the codes related to your modification.

Apply

The selected codes are suppressed in the calibration automatically.

Correct checksums

Checksums are recalculated so the modified file is accepted by the ECU.

Off-road notice: DTC removal is intended for off-road / competition use, typically alongside emission modifications. Do not suppress safety-critical codes. Compliance with local law is the user's responsibility.

FAQ

DTC removal — frequently asked questions

What is DTC removal?

DTC removal suppresses specific diagnostic trouble codes in the ECU so they are no longer logged or trigger a warning. Map Decoder applies it automatically.

Will it clear the dashboard warning light?

Removing the relevant DTC prevents the associated fault from being raised, which typically stops the related warning light after a modification such as EGR or DPF off.

Which codes can be removed?

Specific codes related to a modification can be targeted using the DTC manager. Safety-critical codes should not be suppressed; this is for off-road / competition use.

Is it automatic?

Yes. Select the codes in the DTC manager and Map Decoder applies the change and corrects the checksum.

Pair DTC removal with emission solutions

Prevent fault lights after DPF/EGR/AdBlue off.

Talk to Us DPF Off
Verified coverage

ECUs with mapped DTC data

182 control units carry measured diagnostic trouble code tables in Map Decoder, 115,714 codes in total. Every entry stores the address and the byte values observed on a real file, so removing a code writes what was measured rather than a guessed constant.

Bosch 124 ECUs

Siemens 27 ECUs

Delphi 9 ECUs

Denso 6 ECUs

Marelli 5 ECUs

ACDelco 3 ECUs

  • E783 solutions · 854 DTC
  • E834 solutions · 601 DTC
  • E987 solutions · 1,478 DTC

Continental 3 ECUs

Valeo 3 ECUs

  • V46.x3 solutions · 336 DTC
  • V56.x4 solutions · 446 DTC
  • VD461 solution · 325 DTC

Delco 1 ECU

  • E986 solutions · 1,471 DTC

Transtron 1 ECU

  • 4Jxx4 solutions · 149 DTC

See all supported ECUs