Description
Fuel pressure sensor for Citroën and Peugeot 1.4 HDi and 1.6 HDi. High-pressure sensor mounted on the common-rail fuel rail. Used part with a guarantee of functionality.
This high-pressure rail sensor monitors fuel pressure in the common-rail system and provides the engine control unit (ECU) with real-time data to regulate injection timing and quantity. It is a frequently replaced component on PSA HDi diesel engines when the ECU detects pressure deviations or when drivability issues occur. The sensor is often searched for by its reference numbers, so please check the product codes below when looking for a direct replacement.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Vehicles with 1.4 HDi and 1.6 HDi engines (for example: Citroën C3, C4, Berlingo; Peugeot 206, 207, 307)
- Product Codes: 1920GW, 1570N5
- Other Numbers: 9653981180, 5WS40039
Common Symptoms Of A Faulty Sensor
- Engine Warning Light (ECU Fault Codes Related To Fuel Pressure)
- Rough Idle, Hesitation Or Loss Of Power Under Acceleration
- Hard Starting Or Extended Cranking
- Inconsistent Fuel Consumption Or Black Smoke From Exhaust
Replacement Procedure (Overview)
Recommended for professional workshops or experienced DIY mechanics. Typical replacement steps:
- Relieve Fuel System Pressure Safely Before Work (follow vehicle manufacturer procedure).
- Disconnect The Battery To Prevent Short Circuits During Work.
- Locate The Sensor On The Common-Rail Fuel Rail; Remove Any Engine Covers Or Components Blocking Access.
- Unplug The Electrical Connector And Carefully Unscrew Or Release The Sensor From The Rail (depending on design).
- Fit A New O-Ring Or Sealing Washer If Present, Install The Replacement Sensor And Tighten To Manufacturer Torque Specification.
- Reconnect The Electrical Connector, Reassemble Removed Parts, Reconnect Battery And Start The Engine. Check For Leaks And Clear Any Stored Fault Codes.
Installation Recommendations
- Use Appropriate Tools And Torque Settings — Consult The Vehicle Repair Manual For Exact Values.
- Always Replace Seals Or O-Rings To Ensure Leak-Free Connection.
- Work In A Well-Ventilated Area And Avoid Open Flames Or Sparks When Working With Diesel Fuel.
- Inspect Wiring And Connector Pins For Corrosion Or Damage; Poor Electrical Contact Is A Common Cause Of Intermittent Faults.
Why This Part Most Often Fails
High-pressure rail sensors commonly fail due to contamination from fuel (debris or varnish build-up), exposure to excessive heat and vibration, or electrical connector/wiring deterioration. Mechanical damage during earlier service or a degraded sealing O-ring can also cause pressure reading errors and fuel leaks. Intermittent faults are frequently traced to corroded pins or brittle wiring rather than to the sensor element itself.
Search Keywords: 1920GW, 1570N5, 9653981180, 5WS40039, Fuel Pressure Sensor, Common Rail Sensor, Citroën, Peugeot, 1.4 HDi, 1.6 HDi.
