MED17.4.2 ECU: Professional Chip Tuning File Service for PSA Group 1.6L THP Petrol Engines

The key to performance in Peugeot, Citroen and DS's 1.6L THP (Turbo High Pressure) petrol engines is the MED17.4.2 ECU developed by Bosch. This advanced engine control unit precisely manages the direct injection system, turbo management, and Euro 5 emission control systems.

As OnlineChipTuning, instead of standard database files circulating on the internet, we offer custom file services prepared from scratch by our engineers according to the vehicle's current mechanical condition, fuel quality, and installed hardware. By analyzing the complex injection, boost, and ignition maps of the MED17.4.2 ECU, we ensure you get maximum power and torque within the engine's safe limits.

This page details the technical capacity of the MED17.4.2 ECU, supported PSA Group models, and the Stage 1 and Stage 2 advantages you'll gain by submitting files through OnlineChipTuning.com.

MED17.4.2 ECU Technical Specifications and Potential

The MED17.4.2 is a Bosch-manufactured engine control unit used in PSA Group's 1.6L THP petrol engines, precisely controlling the direct injection and turbo system. It has two hardware versions: TC1767 and TC1797. The original file you upload to our platform is processed with professional software like WinOLS and ECM Titanium to reveal this ECU's hidden potential.

Main optimizations we offer on this ECU:

Performance-oriented adjustment of injection quantity and timing
Safe increase of Turbo Boost Pressure
Optimization of Ignition Timing (Ignition Advance)
Improvement of Throttle Response
Expansion of torque limiter maps
Optimization of LSPI (Low Speed Pre-Ignition) protection
Optimization of special characteristics of PSA THP engines
Performance increase of Racing versions (DS3 Racing, RCZ Racing, 207 GTi)

Which Models Feature MED17.4.2?

This ECU is common in PSA Group's 1.6L THP petrol engines produced especially between 2004-2016. The most processed models in the OnlineChipTuning file panel are:

Citroen (1.6L THP):

Citroen C4/Coupe/Picasso/Grand Picasso 1.6 THP 140-156PS EP6DT/EP6CDT
Citroen C4 Aircross 1.6 VTi 117PS 4A92
Citroen C5 1.6 THP 156PS EP6DT
Citroen DS3 1.6 THP 156PS EP6DT / DS3 Racing 202PS EP6DTS
Citroen DS4 1.6 THP 156-200PS EP6CDT/EP6CDTX/EP6FDT
Citroen DS5 1.6 THP 156-200PS EP6CDT/EP6CDTX/EP6FDTM

DS Automobiles (1.6L THP):

DS 3 1.6 THP Racing 202PS EP6DTS

Peugeot (1.6L THP):

Peugeot 207 1.6 THP 156PS EP6DT / 207 GTi 175PS EP6DTS
Peugeot 208 1.6 THP 156-165PS EP6CDT/EP6FDTM
Peugeot 3008 1.6 THP 156PS EP6CDT
Peugeot 308 1.6 THP 125-156PS EP6DT/EP6CDTD/EP6CDT
Peugeot 408 1.6 THP 165PS EP6FDT
Peugeot 5008 1.6 THP 165PS EP6FDT
Peugeot 508 1.6 THP 156-165PS EP6CDT/EP6FDT / 508 GTi 200PS EP6CDTX
Peugeot RCZ 1.6 THP 156PS EP6CDT / RCZ Racing 205PS EP6CTDR

In these vehicles, the MED17.4.2 can offer remarkable power increases with software (125-150 PS engines with +20/35 HP, 156-165 PS engines with +25/40 HP, Racing versions with +30/50 HP), especially when combined with turbo pressure and ignition optimization. Optimized performance is provided in both hatchback and sedan models as well as sporty versions.

Remove the Limits of Your 1.6L THP Engine. For Engineering Marvel Files; Register Now and Upload Your File

Why Customized Chip Tuning?

Factory software is left very conservative considering Euro 5 emission standards, all types of fuel quality, and harsh climate conditions. OnlineChipTuning shapes the file you read from your vehicle according to your requests (for example: "Sport character for RCZ", "208 GTi Line optimization", "DS3 Racing performance increase").

Advantages of our customized service:

Provides a more elastic power band by reducing turbo lag at low and mid RPMs.
Removes Vmax speed limiters.
Reduces fuel consumption through more efficient combustion and ignition optimization.
Perfects the harmony between automatic and manual transmission and engine torque.
Optimizes special turbo characteristics of PSA THP engines.
Minimizes LSPI (low speed pre-ignition) risk.
Increases performance while maintaining sporty character of Racing versions (DS3 Racing 202PS, RCZ Racing 205PS, 207 GTi 175PS).
Considers features of different versions of EP6 engine family.
Optimizes dynamic settings in sport mode vehicles (RCZ, DS models).

MED17.4.2 Stage 1 and Stage 2 Differences

Customized Stage 1

Power achieved only through software without any part replacement on the vehicle. All systems remain in original condition. Safe performance increase is targeted without shortening engine life.

Safe & Stable Power/Torque Increase (+20-50 HP)
Turbo System Optimization
Sharper Throttle Response
Ignition Advance Optimization

Customized Stage 2

Specific to vehicles with modifications such as performance exhaust system, air filter, and/or intercooler. Maximum performance is unlocked by fully utilizing increased airflow.

Compatible with Performance Parts
Maximum Turbo Pressure Increase
Maximum Torque and Horsepower (+25-60 HP)
Racing Character Optimization

Special Solutions Offered with OnlineChipTuning

Since MED17.4.2 ECU is a petrol unit, we offer all performance solutions specific to PSA THP engines:

VMAX OFF: Removal of factory speed limiter.
Launch Control: Launch control optimization for manual transmission models.
Pop & Bang / Crackle Map: Pop sounds from exhaust when throttle is released (on request).
Cold Start Limiter Remove: Removal of cold start RPM limiter.
Start/Stop Delete: Permanent deactivation of the system.
O2 Sensor Delete: Cancellation of lambda sensor errors (for exhaust modifications).
MAF Sensor Delete: Cancellation of mass air flow sensor errors.
LSPI Protection Optimization: Low speed pre-ignition protection.
PSA THP Turbo Optimization: Special tuning for PSA's THP turbo system.
EP6 Engine Family Tuning: EP6DT/CDT/CDTX/DTS/FDT/FDTM engine family optimization.
Racing Version Calibration: Special tuning for DS3 Racing, RCZ Racing, 207 GTi.
Sport Mode Enhancement: Sport mode strengthening in RCZ and DS models.
GTi Line Optimization: Sporty tuning for Peugeot GTi series vehicles.
TC1767/TC1797 Compatibility: Support for both hardware versions.

Custom File Preparation Process for Your Vehicle

The process works with the "develop file" logic, not the "upload ready file" logic. You read and upload the original file to the system, our engineers verify the Checksum of the file, identify the engine version (EP6DT/CDT/CDTX/DTS/FDT/FDTM, etc.), consider the vehicle type (hatchback, sedan, coupe, SUV) and character type (standard, sporty, racing), add the features you want (e.g., Stage 2 + Pop&Bang + VMAX Off + Racing Calibration) and send the file back to you.

Why Us?

24/7 File Service: Fast turnaround time so you don't keep your customer waiting (average 2-4 hours).
Technical Support: You can get support for problems during file reading, writing, and vehicle adaptation stages.
Warranty: Our software is prepared within engine protection limits (Component Protection).
PSA Group Expertise: We know the special characteristics of Peugeot, Citroen, DS vehicles.
THP Engine Experience: We specialize in all versions of PSA THP (Turbo High Pressure) engines.
EP6 Family Knowledge: We know the differences of EP6DT/CDT/CDTX/DTS/FDT/FDTM engine codes.
Racing Versions: We have experience with sporty models like DS3 Racing, RCZ Racing, 207 GTi.
Sport Character: We increase performance while maintaining the character of RCZ coupe, DS series premium vehicles.
TC1767/TC1797: We have experience with both ECU hardware versions.

Expert Advice: The MED17.4.2 is a sensitive ECU used in PSA Group's 1.6L THP engines and requires special attention for petrol turbo engines. PSA's EP6 engine family is reliable but there is LSPI (low speed pre-ignition) risk; correct adjustment minimizes this risk. Faulty ignition advance causes engine knocking and piston damage. Excessive turbo pressure increase leads to turbo bearing damage. Racing versions (DS3 Racing 202PS, RCZ Racing 205PS) are already high power from factory; careful optimization is required. The 207 GTi 175PS has a sporty hot-hatch character. There are different versions of the EP6 engine family (DT, CDT, CDTX, DTS, FDT, FDTM, CDTD, CTDR); correct version identification is critical. In automatic transmission models, excessive torque increase can lead to clutch problems. Excessive use of Pop&Bang / Crackle map can cause exhaust and catalytic converter damage. RCZ coupe is a sporty vehicle; comfort-performance balance is important. DS series has premium character; maintaining luxury and performance balance is necessary. TC1767 and TC1797 hardware versions use different processors; file format compatibility is important. OnlineChipTuning offers safe performance in PSA THP engines with MED17.4.2 experience.

Your Professional Tuning Solution Partner

You're in the right place to reveal the true character of your 1.6L THP engine and achieve reliable performance suitable for your PSA Group vehicle type (standard, sporty, racing). With our team specialized in the MED17.4.2 ECU, we offer the most suitable, customized software solution for your vehicle in terms of both performance and driving pleasure.

For Petrol Files Specially Prepared for Your PSA THP Vehicle by Our Engineers Create Your Customized File Within Minutes

What is MED17.4.2 ECU? Chip Tuning and Online File Solutions