Description
Fuel Pressure Sensor for 1.6 HDi and 2.0 HDi. Used part with a functional warranty.
This fuel pressure sensor is a reliable replacement option for Citroën and Peugeot diesel engines with 1.6 HDi and 2.0 HDi units. Designed to measure rail pressure and deliver accurate feedback to the engine control unit (ECU), a healthy sensor is essential for correct fuel metering, injection timing and emissions control. Ideal for professional garages and knowledgeable DIY mechanics, the unit is commonly searched by OE and aftermarket product numbers—helpful when locating the correct spare.
Benefits And Fitment
Direct-fit replacement for many Stellantis vehicles equipped with 1.6 HDi or 2.0 HDi engines. Typical applications include small and medium PSA diesel models such as Citroën C3, C4, Berlingo and Peugeot 207, 308, Partner, among others. Replacing a faulty sensor restores stable rail pressure readings, reduces misfires and improves drivability, fuel consumption and emissions performance.
Symptoms Of A Faulty Sensor
- Engine Management Light (MIL) or warning codes related to rail/fuel pressure.
- Hard starting, rough idle or loss of power under load.
- Poor fuel economy and increased smoke from the exhaust.
- Intermittent stalling or limp-home mode activated by the ECU.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: 1.6 HDi, 2.0 HDi
- Product Codes: 9670076780, 9653981180
- Other Numbers: 1920GW, 1570N5, 5ws40039
Installation Recommendations
- Work Safely: Perform replacement in a well-ventilated area away from open flames. Depressurize the fuel system before disconnecting any lines.
- Electrical Isolation: Disconnect the negative battery terminal to prevent accidental short circuits when unplugging the sensor connector.
- Depressurize Fuel Rail: Relieve rail pressure according to vehicle service procedure to avoid fuel spray. Common methods include using the fuel pressure test port or following manufacturer steps in the service manual.
- Remove And Replace: Unplug the electrical connector, unscrew the sensor from the fuel rail, replace the sealing O-ring if present, and install the new sensor by hand to avoid cross-threading.
- Tightening: Tighten to the manufacturer’s torque specification. If the exact torque is not available, tighten firmly but avoid over-torquing. Check sealing surfaces and replace any damaged O-rings or seals.
- Post-Installation Checks: Reconnect the battery, prime the fuel system if required, start the engine and check for leaks and stored fault codes. Clear codes if needed and verify proper operation during a test drive.
Why This Part Typically Fails
- Contamination: Diesel particulates and varnish in the fuel can clog or damage the sensor element over time.
- Electrical Issues: Corrosion or poor contact at the connector causes intermittent signals or open circuits.
- Thermal And Vibration Stress: Continuous heat cycles and engine vibration can degrade internal components and seals.
- Seal Degradation: O-rings and seals may harden or crack, leading to leaks and pressure reading errors.
- High Pressure Spikes: Fuel system faults or injector issues can create pressure spikes that exceed sensor limits.
Life expectancy varies with driving conditions and fuel quality; there is no fixed replacement interval. Failures commonly appear after high mileage or following fuel contamination events. This used unit is supplied with a guarantee of functional operation and is suitable for experienced mechanics and competent DIYers who match the correct part number to their vehicle.
