Description
Power steering control unit for Citroën C2 and C3 vehicles.
This Power Steering Control Unit (EPS Control Module) is designed for Citroën C2 and C3 models and is often sought under original part numbers. It manages steering assistance by processing signals from the torque sensor and vehicle data, delivering precise electric assist for comfortable and safe steering. Ideal for professional auto mechanics and experienced DIYers, the unit is a direct-fit replacement for the listed product codes and restores proper steering assist behavior when the original module becomes faulty.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Power Steering Control Unit / EPS Control Module
- Product Codes: 9650836780, 400687, 400688
- Additional Numbers: NFP
Compatible With: Citroën C2, Citroën C3, Citroën C3 Pluriel. Buyers frequently search by the part numbers listed above—include these codes when checking fitment.
Installation Recommendations
- Safety First: Disconnect the vehicle battery before starting to avoid short circuits and protect the vehicle electronics.
- Access: The control unit is typically located in the steering column area or under the dash—remove necessary trim panels to gain clear access.
- Removal/Replacement Steps: Unplug electrical connectors, unbolt the unit from its mounting, install the new unit in reverse order ensuring connectors are fully seated and locking tabs engaged.
- Post-Installation: Reconnect the battery. Many EPS control units require adaptation or coding with a manufacturer-level diagnostic tool to integrate with the vehicle’s CAN network and to calibrate the steering angle sensor. Perform a steering angle calibration and verify fault codes for a clean system.
- Tools: Basic hand tools, torque wrench for mounting fasteners if specified by vehicle documentation, and a compatible diagnostic tool for coding and calibration.
Why This Part Most Often Fails
- Moisture Ingress And Corrosion: Water or condensation entering connectors or the unit housing causes corrosion and electrical faults.
- Electrical Surges And Poor Grounding: Voltage spikes, bad grounds or intermittent power supply can damage internal electronics or sensors.
- Connector And Wiring Damage: Broken pins, loose terminals or damaged wiring in the steering column area lead to intermittent faults and loss of communication.
- Age And Thermal Stress: Long-term exposure to heat cycles and vibration can degrade solder joints and electronic components.
- Typical Symptoms: Warning lights related to power steering, heavy or inconsistent steering assist, whining or buzzing noises from the steering area, and stored fault codes in the steering or ABS/ESP modules.
Choosing the correct control unit by using the product codes (9650836780, 400687, 400688) significantly increases the chance of immediate fitment. This unit is suited for workshops and competent DIYers familiar with steering system safety and diagnostic procedures.
