EGR valve deactivation — no more clogging faults, no limp mode.
The EGR OFF removes exhaust gas recirculation from the ECU calibration and clears the related fault codes and limp-mode triggers. It is the standard fix after a physical EGR delete or a permanently clogged valve. Validated on the major diesel ECU families and applied in minutes with AutoMod.
Exhaust gas recirculation feeds a metered portion of exhaust back into the intake to lower combustion temperature and cut NOx. Over time the soot that passes the valve coats the EGR valve, the cooler and the intake ports — the valve sticks, flow stops matching the ECU model, and the engine lands in limp mode with insufficient/excessive flow faults (P0400–P0409), rough idle and lazy throttle response.
The EGR OFF patch removes the complete control chain from the calibration: the actuator duty-cycle output, the air-mass model corrections tied to recirculated gas, the flow and position plausibility checks and every EGR-related fault code. Limp-mode and torque-reduction triggers attached to those faults are cleared with it — the ECU simply stops driving and watching the valve.
Upload your file
Drop the original ECU read (.bin, .ori, .mod, .hex). The ECU family is identified automatically.
Pick the solution
Select the service you need — AutoMod applies it in minutes on supported ECUs, or a calibrator handles it manually.
Download the patched file
Pay with credits or directly by card — your modified file is delivered within minutes and stays downloadable for 24 hours.
Commonly ordered with: DPF OFF, TVA OFF and swirl-flap delete.
Related items are worth handling in the same file job: the intake throttle valve (TVA) that meters EGR flow, and the swirl flaps that share the intake side. Applying them together avoids a second flash and keeps the air-path calibration coherent — tick them as options on the same upload.
Best practice is software delete plus a blanking plate or delete kit so no residual soot reaches the intake. After the delete the intake tract stays clean, intake temperature drops slightly and fueling stays consistent — which is why this is the standard companion to a physical EGR removal.
On the calibration side the patch handles both strategies found in the field: ECUs that monitor raw valve flow through the MAF deviation, and later families that cross-check the valve position sensor against the command table. Both paths are disabled, which is why a blanket "EGR delete" generic file often limps again on the first drive cycle while this patch does not.
Inside the file the change is surgical: only the maps and switches of the EGR chain are touched — fueling, boost and the other emissions strategies keep their OEM values. That is also why the patch coexists cleanly with a Stage 1 applied on the same upload.
On the ECU the delete is not a single bit: the air-mass model, the torque-intervention map that reacts to EGR faults, and the diagnostic paths that classify each fault are all independent tables. The patch disables the whole chain, which is why the result survives drive cycles instead of re-faulting after the first hard acceleration.
Covered on all major diesel families: Bosch EDC15, EDC16 and EDC17 (CP04/CP14/CP20/CP24, C46/C54 and more), Delphi DCM3.x–DCM7.x and CRD2/CRD3, Continental/Siemens SID801–SID321, Marelli MJD/MJ8 and Denso diesels — across VAG, PSA, Ford, Mercedes-Benz, BMW, Renault, Fiat and light-commercial applications.
Typical jobs: VW Golf/Passat and Audi A3/A4 2.0 TDI (CFFA/CFGB), BMW N47 118d–530d, Mercedes C220/E220 CDI (OM651), Peugeot/Citroën 1.6–2.0 HDi, Ford 1.6–2.0 TDCi, Renault 1.5–1.6 dCi, Fiat/Alfa 1.6–2.0 JTD and light-commercial applications.
Read the ECU with your workshop tool — KESS3 or Autotuner over OBD on most EDC16 builds, FLEX or bench mode on locked EDC17/MD1 units. Upload the original file, apply the patch, write it back with the same tool and confirm EGR duty at 0% with no stored codes. Every patch can be verified in WinOLS before flashing.
EGR OFF vs TVA OFF vs swirl-flap delete: the EGR valve meters the recirculated gas, the TVA is the intake throttle that helps it and damps shutdown, the swirl flaps tumble the air. They fail together on the same intake — which is why most jobs patch all three in one file rather than chasing them one fault at a time.
The software stops the valve from opening, so it is not mandatory — but a plate blocks residual soot and oil vapor from reaching the intake and is recommended when the valve body stays in place.
No. The monitoring that generates them is switched off together with the function, so the codes cannot reappear.
On a clogged system you typically recover the consumption the engine had when clean. The main gain is reliability — no more sticking valve or limp mode.
Yes. Your original file stays on record and the stock calibration can be flashed back at any time.
Cylinder temperatures rise slightly on some engines — the reason manufacturers fit EGR — which is why deletes belong on off-road/competition vehicles and should be paired with the mechanical delete done properly.
DPF OFF
DPF deactivation — remove the filter without warnings or regeneration faults.
ADBLUE OFF
AdBlue/SCR deactivation — no more warnings, countdowns or no-start conditions.
OPF OFF
OPF/GPF deactivation for petrol engines after filter removal.
CAT OFF
Catalytic converter deactivation — clean dashboard after a cat delete.