Description
SAGEM Control Unit For Peugeot 206 1.4i
High-quality SAGEM ECU (S2000 series) designed for Peugeot 206 1.4i engines. This engine control unit is often searched for by its product codes (9644625680, 9646988780, 1940W5, 1940W6, 194456) and is suitable for professional workshops and competent DIY enthusiasts who perform engine electronics repairs. The unit manages fuel injection, ignition timing and engine sensors to ensure smooth idle, correct fueling and compliance with emission control strategies. When replacing an ECU, correct identification by product code and proper initialization or cloning is essential to restore full functionality.
Technical Information
- Manufacturer: SAGEM
- Model: Peugeot 206 1.4i
- Product Codes: 9644625680, 9646988780, 1940W5, 1940W6
- Additional Numbers: 194456
Function And Application
The ECU Controls Engine Management Functions Including Fuel Injection Timing, Ignition Advance, Idle Control And Sensor Diagnostics. It Processes Inputs From Sensors Such As Crankshaft Position, Throttle Position, Intake Air Temperature And Oxygen Sensors To Optimize Engine Performance And Emissions. This Unit Is Intended Specifically For Peugeot 206 1.4i Petrol Applications Where The SAGEM S2000 Family Was Used.
Replacement Procedure
- Disconnect The Negative Battery Terminal Before Any Work To Avoid Short Circuits And Damage To Electronic Components.
- Access The ECU Location According To The Vehicle Workshop Manual. Gain Adequate Access By Removing Necessary Trim Or Covers.
- Carefully Unplug All Electrical Connectors From The ECU. Release Any Locking Tabs Without Forcing Them.
- Remove Mounting Bolts And Extract The ECU. Inspect Connectors And Wiring For Corrosion Or Damage.
- Install The Replacement Unit And Reconnect Connectors Securely. Refit Mounting Hardware To The Specified Torque.
- Perform Data Cloning Or Coding As Required (See Installation And Coding – Important Below). Verify Engine Starts, Idle Behavior And Diagnostic Trouble Codes With A Suitable Diagnostic Tool.
Installation And Coding – Important
– The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
– Options To Commission:
- Cloning Data From The Old Unit (EEPROM/Flash) – After Cloning The Unit Is Plug And Play.
- Virginization And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Adaptation.
– Recommended To Be Performed By A Professional With PSA Service Equipment (DiagBox/Lexia/PP2000).
– Before Removal/Installation Always Disconnect The Battery And Follow The Manufacturer’s Procedure To Avoid Damaging The Unit.
Installation Recommendations
- Work In A Clean, Dry Environment To Reduce The Risk Of Contamination Or Moisture Entering Connectors.
- Inspect Harnesses And Ground Points For Corrosion; Clean And Secure Grounds To Prevent Intermittent Faults.
- Avoid Stressing Connector Pins When Reconnecting. Use Contact Cleaner If Corrosion Is Present And Replace Damaged Connectors.
- After Installation, Clear Old Fault Codes, Then Run Live Data And Functional Tests To Confirm Proper Operation.
- If Cloning Or Coding Is Required, Use Approved PSA Diagnostic Tools Or Entrust The Procedure To A Technician Equipped With Them.
Most Common Failure Causes
Common Reasons For ECU Failure Include Water Ingress And Corrosion Of Connectors, Thermal Stress Leading To Cracked Solder Joints, Voltage Spikes From Poor Battery/Alternator Regulation Or Incorrect Jump-Starting, And Physical Damage From Impact Or Improper Handling. Symptoms Of A Faulty Unit May Include Engine Stalling, Harsh Idle, Misfires, Incorrect Fuel Consumption, Or Multiple Sensor-Related Fault Codes.
