Product Overview

High-quality engine control unit (ECU) IAW 6LP2.05 from Magneti Marelli, designed for use in vehicles equipped with the 1.4 16V KFU engine family. This unit is suitable for professional workshops and experienced DIY mechanics who need a reliable engine management module to restore proper fuel injection, ignition timing and engine operation. Commonly searched by its part numbers and codes, the ECU is a direct-fit solution for affected Citroën and Peugeot models where the IAW 6LP2.05 specification is required.

How This Unit Works And What It Controls

The ECU Controls Fuel Injection, Ignition Timing, Idle Management And Diagnostic Communication. It Receives Inputs From Sensors (Crankshaft Position, Camshaft Position, Throttle, MAP/MAF, Temperature Sensors) And Commands Injectors, Ignition Coils And Idle Actuators To Ensure Stable Engine Performance. A Faulty Unit Can Cause Misfires, Poor Starting, Increased Fuel Consumption Or Loss Of Power.

How To Replace

General Replacement Steps: Disconnect The Battery Before Any Work. Locate The ECU (Usually In The Engine Bay Or Close To The Firewall Depending On Model). Unplug Electrical Connectors Carefully And Remove Fastening Bolts. Swap The Unit, Refit Connectors And Secure Bolts With Correct Torque. After Mechanical Fitment The Unit May Require Coding Or Data Transfer To Match The Vehicle Immobiliser And Key System — See Installation And Coding Section Below.

Technical Information

• Manufacturer: Magneti Marelli
• Model: IAW 6LP2.05
• Product Codes: 9664339980, 9664934380
• Additional Numbers: 9653979480, 9650909180, 16.735.084, 16.631.064, 16.631.054, 16.735.054, 1940XH, 1940XJ
• Engine Compatibility: 1.4 16V KFU
• Origin Vehicle: Removed From Citroën C4

Installation And Coding – Important

• The Unit Is Used And Is Paired With The Original Vehicle (VIN/PIN/Keys).
• Options For Commissioning:
  1. Cloning Data From The Old Unit (EEPROM/Flash) – After Cloning The Unit Is Plug And Play.
  2. Virginization And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Adaptation.
• Recommended To Be Performed By A Specialist With PSA Service Equipment (DiagBox/Lexia/PP2000).
• Always Disconnect The Battery Before Removal/Installation And Follow The Manufacturer Procedure To Avoid Damaging The Unit.

Installation Recommendations

Perform Installation In A Dry, Clean Environment. Inspect Connector Pins For Corrosion Or Bent Contacts And Clean The Mating Surfaces If Necessary. Use Proper Tools For Fasteners And Follow Manufacturer Torque Specifications Where Available. After Installation Verify Wiring Grounds And Battery Voltage. If Cloning Is Chosen, Ensure A Complete EEPROM/Flash Backup Of The Original Unit. If Virginizing, Prepare The Required Diagnostic Equipment And Original Key Information.

Most Common Failure Causes

ECUs Of This Type Typically Fail Due To Water Ingress, Corrosion On Connectors, Thermal Stress And Solder Joint Fatigue. Electrical Surges From Faulty Charging Systems Or Jump-Starting With Incorrect Polarity Can Damage Internal Electronics. Software/Immobillizer Mismatches Or Lost Key Pairings Are Also Frequent Sources Of Perceived ECU Faults.

Who Should Fit This Unit

Recommended For Experienced Mechanics And Workshops Familiar With PSA Electronics. DIY Enthusiasts With Good Electrical Knowledge Can Perform Mechanical Replacement; Coding Or Cloning Steps Should Be Carried Out By A Specialist Or With Proper Diagnostic Equipment.

Keywords For Search

ECU IAW 6LP2.05, Magneti Marelli ECU, Citroën Peugeot Engine Control Unit, 9664339980, 9664934380, 1.4 16V KFU ECU