This fuel rail pressure sensor is a reliable replacement option for diesel HDi engines from the PSA/Stellantis group. Designed to monitor high fuel pressure directly on the common rail, the sensor provides the engine management unit with real-time data used to regulate injection timing and quantity. Perfect for professional garages and DIY mechanics who search by OE code (e.g. 9664111780 or 1920TL), this part helps restore correct rail pressure readings and engine performance.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Vehicles With 1.4 HDi, 1.6 HDi And 2.0 HDi Engines
• Product Codes: 9664111780
• Other Numbers: 1920TL

Compatibility Notes

Commonly Found On Various Citroën And Peugeot Models Equipped With HDi Engines (Examples: Citroën C3, C4, Berlingo; Peugeot 207, 307, 308, Partner). Always confirm the OE code or item number when searching to ensure correct fitment.

Installation Recommendations

• Work In A Well-Ventilated Area And Observe All Safety Precautions For High-Pressure Fuel Systems.
• Before Removal, Relieve Fuel System Pressure According To Manufacturer Procedure To Avoid Injury Or Fuel Spray.
• Disconnect Battery Negative Terminal To Prevent Electrical Shorting When Unplugging The Sensor Connector.
• Unplug Electrical Connector From The Sensor, Clean The Surrounding Area To Prevent Contamination, Then Unscrew The Sensor From The Fuel Rail Using The Correct Socket.
• Install New Sensor Carefully; Use Manufacturer-Approved Seals Or Thread Sealant If Required And Tighten To Manufacturer Torque Specification.
• After Installation, Crank The Engine To Prime The Fuel System And Check For Leaks. Clear Any Fault Codes And Verify Proper Rail Pressure Readings With Diagnostic Equipment.

Why This Part Commonly Fails

Rail pressure sensors are exposed to extreme pressures, temperature fluctuations, and contaminated fuel. Common Failure Causes Include:

• Contamination From Particulate Matter Or Water In The Fuel Causing Sensor Drift Or Shorts.
• Electrical Connector Corrosion Or Damaged Wiring Leading To Intermittent Signals.
• Mechanical Damage During Engine Work Or Impact.
• Age-Related Wear And Internal Sensor Degradation Affecting Accuracy.

Replacement Typically Restores Accurate Fuel Pressure Readings, Eliminates Related Misfires Or Limp-Home Modes, And Helps Reestablish Proper Injection Control.

This fuel rail pressure sensor is designed for Citroën and Peugeot diesel engines with 1.4 HDi and 1.6 HDi units. It monitors high-pressure fuel in the common rail and sends precise pressure data to the engine control unit (ECU) to regulate injection timing and quantity. Correct rail pressure measurement is critical for smooth idle, responsive acceleration, efficient fuel consumption and low emissions. Commonly Searched Part Numbers: 96554465480, 9653981180, 1570G2, 1570N5, 1920TL, 1920GW, 5WS40039.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Vehicles Equipped With 1.4 HDi And 1.6 HDi Engines (Common Rail)
• Product Codes: 96554465480, 9653981180
• Other Numbers: 1570G2, 1570N5, 1920TL, 1920GW, 5WS40039

Installation Recommendations

• Relieve Fuel System Pressure Before Starting Work To Avoid Fuel Spray.
• Disconnect The Battery And Then Unplug The Electrical Connector From The Sensor.
• Unscrew The Sensor From The High-Pressure Rail Using The Correct Socket Or Wrench; Protect Surrounding Components From Fuel Spillage.
• Inspect The Sensor Port And Replace Any Damaged Seals Or O-Rings; Ensure Clean Sealing Surfaces Before Fitting The New Unit.
• Fit The Replacement Sensor Hand-Tight, Then Secure To Manufacturer Torque If Available; Reconnect The Electrical Connector And Battery.
• Prime The Fuel System By Cranking The Engine Or Using The Fuel Pump Cycle, Then Check For Leaks And Clear Related Fault Codes With A Diagnostic Tool.
• Recommended For Installation By Experienced Technicians Or Skilled DIYers With Basic Diesel-System Knowledge And Proper Tools.

Reason Why Part Fails Most Often

• Contamination From Dirty Fuel Or Debris In The Rail Leading To Sensor Blockage Or Internal Damage.
• Corrosion Or Electrical Connector Issues Causing Intermittent Signal Loss.
• Exposure To Excessive Vibration Or Mechanical Damage During Engine Work.
• High-Pressure Pump Or Injector Faults Causing Abnormal Pressure Spikes That Can Damage The Sensor.
• Symptoms Of Failure Include Engine Warning Lights, Poor Idling, Hesitation Under Load, Hard Starting, Increased Fuel Consumption And Fault Codes Related To Fuel Rail Pressure (E.g. OBD Codes P0190–P0194).

This sensor is ideal for mechanics and DIY enthusiasts who need a direct replacement identified by common OEM numbers. Use The Listed Product Codes When Searching Or Ordering To Ensure Correct Fitment.