Description
Fuel pressure sensor for 1.6 HDi and 2.0 HDi. Used part with a functional guarantee.
This fuel pressure sensor is a direct-fit replacement for many Citroën and Peugeot HDi common-rail engines. It monitors rail pressure and provides real-time data to the engine control unit (ECU) to regulate injector timing and fuel delivery. Ideal for professional mechanics and experienced DIYers who often search by OE number, this unit is commonly referenced under codes such as 9670076780, 9653981180, 1920GW, 1570N5 and 5WS40039.
Faulty fuel pressure sensors typically cause warning lights, rough idling, loss of power, poor fuel economy, hard starting or intermittent limp-home mode. Replacing a failing sensor restores accurate pressure feedback, improves driveability and prevents incorrect fueling that can affect emission control and turbo response.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: 1.6 HDi, 2.0 HDi
- Product Codes: 9670076780, 9653981180
- Additional Numbers: 1920GW, 1570N5, 5WS40039
Installation Recommendation
Before starting, relieve fuel system pressure and work in a well-ventilated area away from open flames. For safety, disconnect the negative battery terminal. Locate the sensor on the common rail, unplug the electrical connector and remove the retaining fastener(s). Carefully withdraw the sensor and replace the sealing washer or O-ring with a new one to ensure a leak-free fit. Fit the replacement sensor, secure it to the rail, reconnect the electrical connector and restore battery power. After installation, prime the fuel system by cranking the engine or activating the fuel pump, check for leaks and clear any stored fault codes with a diagnostic tool if necessary. Use appropriate hand tools and avoid excessive torque on the sensor body—tighten to the manufacturer’s specification where available.
Why This Part Fails Most Often
Common causes of sensor failure include contamination from fuel (particles or water), corrosion of electrical contacts, vibration and thermal cycling, or internal electronics deterioration. Fuel system issues such as a failing fuel filter, contaminated fuel, or pressure spikes from a faulty high-pressure pump can accelerate wear. Regular maintenance of the fuel system and attention to cleanliness during service helps prolong sensor life.
Parts searched by OE number sell quickly — if you need dependable compatibility with Citroën or Peugeot HDi engines and a used part supplied with a functional guarantee, this fuel pressure sensor is a cost-effective solution for garages and skilled DIY mechanics.
