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Ask Harry – Injector Wiring Fault

RMI Senior Technical Advisor, Harry Lewis, investigates an injector wiring fault.

VEHICLE: Land Rover Discovery Sport 2015-2017 & Range Rover Evoque 2016 – Ingenium I4 2.0 Diesel.

YEAR: 2015 – 2017

Q: The engine malfunction indicator lamp has come on with the diagnostic trouble code of P2047 on our customer’s Land Rover Discovery Sport. What does this mean? 

A: This is a fault that affects both the Land Rover Discovery Sport and the Range Rover Evoque. The trouble code P2047 indicates Reductant Injector 1 Bank 1 – open circuit. This can be caused by tension in the Diesel Exhaust Fluid (DEF) injector wiring, which causes an open circuit condition. 

DEF Injector.

Injector wiring repair.

A repair kit is available from Jaguar Land Rover Parts. 

You should remove and discard the DEF injector wiring harness aluminium tape and protective sleeve before repairing the DEF injector wiring harness. Make sure the length of the DEF wiring harness from the main wiring harness has increased to 120mm, as shown in the diagram below. 

Then, install locally sourced aluminium tape (with an operating temperature of -40 degrees Celsius – 160 degrees) to the DEF injector wiring harness, after you have completed the repair. 

Connect the DEF injector plug to the DEF injector, clear relevant trouble codes and test. 

The RMI Technical Helpline is available to support technicians experiencing problem repairs, help with undocumented fault codes and guide users through wiring diagrams. For more information call the Independent Garage Association helpline on 0845 305 4230 or email 


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Autotechnician is a magazine published nine times a year, delivering essential information to independent garage owners and technicians in the UK. Delivered both digitally and in print, autotechnician provides readers with technical, training, business advice, product and news, allowing our readers to keep up to date with information they need to run and work within a modern workshop.
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