Citroen Relay YLFS Injectors

Citroen Relay YLFS Overview

The Citroen Relay with the YLFS 2.0L EcoBlue engine was produced between 2019 and 2024. This vehicle uses Siemens VDO / Continental common rail diesel injectors (primary part number None) operating at fuel pressures up to 2000 bar. The YLFS engine in the Citroen Relay produces and of torque. When replacing injectors on the Citroen Relay YLFS, always use new copper sealing washers and torque to manufacturer specifications. Each injector should be coded to the ECU after fitting.

Compatible Injectors

Common Injector Problems in Citroen Relay

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  Rough idle and engine vibration — Worn injector nozzles cause uneven fuel spray, leading to rough idle at low RPM. Most noticeable when the engine is cold.
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  Excessive exhaust smoke — Black or blue-grey smoke on acceleration indicates poor fuel atomisation. This is often caused by carbon buildup on the injector nozzle tip.
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  Poor fuel economy — A worn or leaking injector delivers incorrect fuel quantities, reducing efficiency by 10–20% in severe cases.
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  Engine misfire under load — Intermittent misfires during acceleration suggest one or more injectors are failing to deliver the correct fuel pressure.
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  Difficult cold starting — Degraded injector nozzles struggle to atomise fuel at lower cranking pressures, causing extended crank times in cold weather.

Other Engine Codes for Citroen Relay

Other YLFS Vehicles

Related Pages

Siemens VDO / Continental 2.0L EcoBlue — browse compatible engines, vehicles, and injectors