Land Rover Key Issues, Immobiliser Faults & Ignition Problems – Technical FAQ Guide

Land Rover and Range Rover models are known for luxury and advanced electronics, but also for repeated faults in their key, immobiliser, and ignition systems. “Smart Key Not Found”, “Immobiliser Active”, dead steering column locks, and failing KVM modules are extremely common on Range Rover, Evoque, Discovery, Defender, and Freelander.

Most issues can be diagnosed and repaired on-site, without dealership recovery. This guide covers the most frequent Land Rover Key & Ignition issues our locksmiths see across London and how we fix them quickly and professionally.

Land Rover / Range Rover – Short Technical FAQs

1. Why does my Land Rover show “Smart Key Not Found”?

This usually points to a failing proximity antenna, a low smart-key battery, or a KVM module fault. Land Rover smart keys often lose communication due to weak internal coils or damaged door antennas. We test each antenna, re-sync the key, and replace failing components on-site.

2. Why won’t my Range Rover start even though the key is inside?

If nothing happens when pressing Start, the KVM (Keyless Vehicle Module) isn’t authenticating the key. This is common after voltage drops or water ingress under the boot floor. We diagnose the KVM, restore coding, and reprogram your key so the vehicle recognises it again.

3. Why does my Land Rover show “Immobiliser Active” or crank with no start?

A non-start with immobiliser warnings usually comes from a corrupted KVM module, a weak transponder coil in the key, or poor communication with the BCM/ECU. We run immobiliser diagnostics, repair the communication fault, and reprogram the key where needed.

4. Why is my steering column not unlocking on my Range Rover?

Electric steering lock failures are common on Evoque, Discovery Sport, and Range Rover L405. A worn lock motor or low voltage prevents the steering from releasing. We repair or replace the steering lock and code it to the immobiliser so the ignition activates normally.

5. Why does my Land Rover unlock with the remote but not start?

The RF part of the key may work, but the transponder chip may be damaged or desynchronised. This causes locking to work, but starting to be blocked. We test the transponder, reprogram it, or supply a new coded smart key that starts the vehicle reliably.

6. Why is my smart key range very weak or intermittent?

Weak range is usually caused by water-damaged PCB components, corroded battery contacts, or failing RF amplifiers inside the key. We repair the PCB, restore RF output, and ensure the key communicates consistently with the vehicle.

7. Why does my Range Rover lose key synchronisation after battery replacement?

Land Rover electronics are extremely sensitive to voltage dips. A flat or replaced battery can cause the KVM to drop stored key data. We stabilise voltage, re-sync the key, and restore KVM-ECU communication.

8. Why is my Land Rover central locking working only sometimes?

Land Rover suffers from door-latch failures and broken wiring in the door harness. This causes intermittent locking, unresponsive doors, or locks that cycle repeatedly. We identify the faulty latch or wiring section and repair it on-site.

9. Why does my Evoque or Discovery Sport show “Key Not Recognised” at random?

Intermittent detection often comes from failing cabin antennas or a KVM module beginning to fail. Moisture under the boot floor is a common cause. We test the full antenna network and repair the affected module.

10. Why won’t my Land Rover start after a jump-start?

Jump-starting frequently triggers immobiliser corruption on Range Rover and Discovery models. The KVM or BCM may lose coding during voltage spikes. We reinitialise the immobiliser sequence and restore pairing so the vehicle starts normally again.

11. Why is the Start button unresponsive with no ignition lights?

This typically indicates the steering lock hasn’t released or the KVM isn’t sending the start authorisation. We diagnose both modules, repair the failing unit, and restore full ignition power.

12. Why does my Land Rover keyless entry only work on one side?

This happens when one of the door antennas or handle sensors has failed, common on Evoque and L494 Sport. We test each antenna, replace the faulty one, and recalibrate the KVM.

13. Can you programme a new Land Rover smart key if all keys are lost?

Yes. We extract security data from the KVM module and programme new smart keys on-site, and can also disable lost keys for security. No towing or dealership visit required.

14. Why does my Range Rover display a flashing key symbol?

A flashing key symbol indicates unstable immobiliser communication, often from a failing KVM or weak key transponder. We diagnose the communication chain and repair the faulty component to prevent a no-start situation.

15. Why is my Land Rover vulnerable to steering lock “clicking” but no ignition?

A failing steering lock motor causes clicking noises but no activation. This is a common precursor to total lock failure. We replace or repair the lock and reprogramme it before it leaves you stranded.