Control Unit IAW 6LP2.12 9664339980 9665936280

Description

Control Unit Magneti Marelli IAW 6LP2.12
Fits 1.4 16V KFU Engines For Citroën And Peugeot Vehicles
Taken From A Citroën C4 2009

Product Overview

Compact and reliable engine control unit (ECU) Magneti Marelli IAW 6LP2.12 designed for PSA Group 1.4 16V KFU engines. This used control unit is suitable for professional workshops and experienced DIY mechanics who need an OEM-style replacement ECU with matching part references. The unit manages fuel injection, ignition timing, and engine sensors to ensure correct engine performance, drivability and emissions compliance.

Key Functions

• Controls fuel injection timing and duration for optimal combustion.
• Manages ignition timing and spark events.
• Processes sensor signals (MAP/MAF, coolant temperature, throttle position, crankshaft/camshaft sensors).
• Interfaces with immobilizer and vehicle CAN networks.
• Provides fault diagnostics and triggers engine management warning lights.

Compatibility

Designed for vehicles equipped with the 1.4 16V KFU petrol engine. Confirmed origin: Citroën C4 (2009). May fit other Citroën and Peugeot models that use the same engine and ECU part numbers—check part codes listed below against your vehicle listing.

Replacement And Installation Guide

Replacing the ECU is a straightforward process for a trained mechanic. Typical replacement steps:

1. Park vehicle on level ground and ensure ignition is off.
2. Disconnect the negative battery terminal and wait a few minutes to discharge capacitors.
3. Locate the ECU (consult vehicle repair manual for exact location).
4. Release connector locking tabs and carefully disconnect wiring harnesses. Inspect connectors for corrosion or bent pins.
5. Remove mounting bolts and extract the ECU from its bracket.
6. Install the replacement unit, secure mounting bolts and reconnect harnesses firmly.
7. Perform coding/cloning or initialization as required (see Installation and Coding section below).
8. Reconnect battery and perform a full system scan with a diagnostic tool to clear codes and confirm proper communication.

Common Symptoms Of A Faulty ECU

• Engine will not start or intermittent cranking/no-start conditions.
• Stalling, misfires, or irregular idle.
• Reduced engine performance or limp-home mode.
• Persistent engine management (MIL) light and stored fault codes related to sensors or communication.
• Loss of communication with diagnostic tools.

Technical Information

• Manufacturer: Magneti Marelli
• Model: IAW 6LP2.12
• Product Codes: 9664339980, 9665936280
• Additional Numbers: 16.631.064, 16.988.004, 1940XH, 1940XJ
• Origin: Removed from Citroën C4 (2009)

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 technician with PSA service equipment (DiagBox/Lexia/PP2000).
• Always disconnect the battery before removal/installation and follow manufacturer procedures to avoid damaging the unit.

Recommendations For Installation

• Use a quality diagnostic tool to read and document existing ECU data and fault codes before removal.
• Inspect and clean wiring harness connectors; replace damaged seals or pins to prevent moisture ingress.
• If cloning is chosen, ensure a full EEPROM/Flash backup of the original unit is taken and verified.
• After installation, perform key adaptation and confirm all sensors and actuators operate within specification.
• Protect the unit from water exposure and strong vibration; secure mounting to original torque settings.

Why This Part Fails Most Often

Most ECU failures are caused by environmental and electrical issues rather than internal component wear. Typical causes include water ingress and corrosion of connector pins, thermal stress and repeated heat cycling, voltage spikes from jump-starts or faulty charging systems, and mechanical damage from improper handling during service. Faulty grounding or intermittent connector contact can produce erratic behavior that mimics internal ECU faults.

Who Should Fit This Part

Recommended for qualified technicians and experienced DIY mechanics who have diagnostic equipment and the ability to perform cloning or coding procedures. Proper commissioning is critical to restore full vehicle functionality.