Citroen C6 AJD Injectors

Citroen C6 AJD Overview

The Citroen C6 with the AJD Jaguar / Land Rover / PSA 2.7 TDV6 (DT17) engine was produced between 2005 and 2011. This vehicle uses Siemens VDO / Continental common rail diesel injectors (primary part number A2C59511316) operating at fuel pressures up to 2000 bar. The AJD engine in the Citroen C6 produces and of torque. When replacing injectors on the Citroen C6 AJD, 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 C6

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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 C6

Other AJD Vehicles

Related Pages

Siemens VDO / Continental Jaguar / Land Rover / PSA 2.7 TDV6 (DT17) — browse compatible engines, vehicles, and injectors