JLR 204DTA 2.0 Ingenium Diesel Injector Problems: Symptoms & Repair (UK)

The Ingenium 204DTA is JLR's in-house 2.0-litre diesel, replacing Ford-sourced engines. Found in the Discovery Sport, Evoque, and Jaguar XE/XF/F-PACE. Uses Bosch solenoid injectors. A modern, refined engine with fewer injector issues than predecessors.

Common 204DTA injector failure symptoms

• Subtle idle roughness: The Ingenium is very refined — any roughness is immediately noticeable.
• AdBlue warnings: Poor combustion increases NOx, triggering SCR system warnings.

Why 204DTA injectors fail

• fuel contamination
• high-pressure wear cycles
• carbon buildup
• poor fuel quality
• internal valve wear

How to diagnose 204DTA injector faults

1. Read fault codes: Connect an OBD-II scanner and note any injector-related codes (P0201–P0204, P2146, P2149). This identifies which cylinder is affected.
2. Perform a leak-off test: Disconnect the fuel return pipes and route into measuring containers. Run the engine at idle for 60 seconds. Compare volumes per cylinder against manufacturer spec.
3. Listen for injector tick: Use a mechanic's stethoscope on each injector body. A dead or irregular tick indicates a stuck or failing solenoid.
4. Check fuel rail pressure: Monitor live fuel rail pressure data via diagnostic tool. Low pressure can mimic injector symptoms and may indicate a fuel pump issue instead.
5. Inspect for external leaks: Check around injector seals for signs of fuel or combustion gas leakage. Black carbon deposits indicate a blown seal.
6. Cylinder balance test: Use diagnostic software to run a cylinder contribution test. This electronically disables each injector in turn to measure its effect on engine speed.

Fault codes linked to 204DTA injector issues

• P0201-P0204 – Injector circuit malfunction

204DTA repair advice

Ingenium injectors require coding via SDD/Pathfinder. The AdBlue system should be checked after replacement if NOx codes were present.

204DTA injector replacement cost (UK)

• Per injector: £180 - £350
• Full set: £700 - £1,200
• Labour: £120 - £300

Compatible injector part numbers for 204DTA

• Bosch 0445110533 – Bosch injector for Ingenium 204DTA
• Jaguar Land Rover G4D3-9K546-AA – JLR OE reference

Vehicles using the 204DTA engine

• Land Rover Discovery Sport (2015-present)
• Land Rover Range Rover Evoque (2015-present)
• Jaguar XE (2015-present)
• Jaguar F-PACE (2016-present)

Find your exact 204DTA injector by registration

Frequently asked questions

Are Ingenium injector problems common?

Less common than the older Ford-sourced 224DT. Most issues appear after 60,000+ miles.

How much does Ingenium injector replacement cost?

A single injector costs £250-£400. Full set: £1,000-£1,600 plus labour.

How much does it cost to replace injectors?

Replacement typically costs £150–£350 per injector depending on brand and engine. A full set of four with professional fitting usually costs £600–£1,200.

Can I drive with a faulty injector?

Driving with a faulty injector can cause engine damage, increased fuel consumption, DPF contamination, and oil dilution. We recommend diagnosis and replacement as soon as possible.

Do new injectors need coding?

Some vehicles require injector coding after replacement using manufacturer-specific diagnostic tools. Many Bosch solenoid units are plug and play. Check your engine guide for specific requirements.