Description
Fuel Pressure Sensor for 1.6 HDi and 2.0 HDi. Used part with guaranteed functionality.
This fuel pressure sensor measures the pressure in the common rail and supplies the engine control unit (ECU) with real-time data to regulate injection timing and quantity. Designed for Stellantis diesel engines, it is compatible with many Citroën and Peugeot vehicles equipped with 1.6 HDi and 2.0 HDi powerplants. The sensor helps maintain smooth idle, correct fuel delivery and proper emissions control — replacing a faulty unit typically restores drivability, reduces limp-home mode events and clears pressure-related fault codes.
For professional mechanics and experienced DIYers: this used but functionality-guaranteed sensor is a cost-effective alternative to new OE parts when the original sensor fails. Because the sensor is often searched by product codes, the listing includes multiple reference numbers so you can quickly match it to your vehicle.
Technical Information
Manufacturer: Stellantis / Citroën / Peugeot
Model: 1.6 HDi, 2.0 HDi (Diesel Common-Rail Engines)
Product Codes: 9670076780, 9653981180, 1920GW, 1570N5, 5WS40039
Additional Numbers: 5WS40039
Typical Applications
Commonly fitted to a range of Citroën and Peugeot models with 1.6 HDi or 2.0 HDi engines. Typical examples include Citroën C3, C4, Berlingo and Peugeot 207, 307, 308 and 3008 — primarily vehicles that use the Stellantis/Diesel common-rail systems. Use the listed product codes to confirm fitment for your specific engine variant.
Symptoms Of A Failing Sensor
- Illuminated engine warning light (check engine).
- Loss of power, rough idle or stalling.
- Poor acceleration and occasional limp-home mode.
- Erratic fuel pressure readings or stored pressure-related fault codes (e.g., rail pressure sensor faults).
Why The Sensor Commonly Fails
The most frequent causes are contamination from fuel deposits, ingress of water or debris, electrical connector corrosion, mechanical damage to the sensing diaphragm and long-term exposure to pressure/temperature cycles. Faults can also result from fuel system issues such as a clogged fuel filter or failing high-pressure pump that stress the sensor.
Replacement And Installation Recommendations
Replacement is straightforward for a trained technician or competent DIYer with basic workshop tools. Typical procedure:
- Depressurize the fuel system before any intervention (follow vehicle‑specific procedure).
- Disconnect the negative battery terminal to avoid electrical shorts.
- Unplug the sensor electrical connector and remove the securing fastener(s).
- Unscrew the sensor from the fuel rail—retain or replace the sealing O‑ring as required.
- Fit the replacement sensor with a new seal, hand-tighten and then torque to the manufacturer’s specification where available; avoid overtightening.
- Reconnect the electrical connector and battery, then cycle ignition to check for leaks and correct ECU response. Clear fault codes and verify proper fuel pressure readings.
Recommended practice: Replace the fuel filter if it is overdue and inspect fuel lines and connectors for contamination. Use appropriate thread seal and a new O‑ring where applicable.
Service Life And Maintenance Tips
Service life depends on fuel quality and operating conditions; sensors on well-maintained systems often last many years, while those exposed to contaminated fuel or repeated pressure spikes may fail earlier. Regular fuel filter replacement and keeping the fuel system free of contaminants extend sensor life.
This listing is aimed at mechanics and competent DIY enthusiasts looking for a reliable, used fuel pressure sensor that fits many Citroën and Peugeot HDi engines. Use the reference numbers above to compare with your vehicle’s part number for a quick match.
