A recent customer case highlights an issue with a generated smart key for a 2018 Range Rover Evoque using the Xhorse XM38 JLR-style smart key and programmed via VVDI Key Tool Plus Pad. While the key initially worked, it has since developed inconsistent performance:
- Sometimes the smart key functions normally.
- At other times, the vehicle does not detect the key unless it is placed in the emergency inductive start area.
- Remote button responses are irregular—occasionally working, often failing.
- The issue becomes more noticeable when the key is placed inside its housing.
- The original factory key continues to work without any issues.
This behavior suggests the problem lies not with the vehicle itself but with the programmed aftermarket smart key.
Suggested Solutions:
1. Check the Key Fob Battery
Even if a fresh battery was installed during key generation, it’s important to test or replace it with another known-good battery. Weak or inconsistent voltage can cause intermittent performance.
2. Adjust Power Output Settings
Xhorse tools allow modification of a smart key’s power output level.
Steps:
- Enter the key generation menu.
- Select “Modify” to adjust the key’s configuration.
- Review the displayed information, including frequency and power level.
- Increase the power output gradually—for example, if the current setting is 5, try raising it to 10.
This may improve the smart key’s communication strength with the vehicle.
3. Try a Different Key
Some technicians have reported similar issues with the XM38 smart key. If battery replacement and power adjustments do not resolve the problem, consider:
- Using a different compatible aftermarket key, such as an Autel iKey smart key.
- Cloning the key directly from the BCM’s stored key ID.
- Purchasing and programming an original OEM key via OBD for maximum reliability.
When working with aftermarket smart keys like the Xhorse XM38 JLR-style, inconsistent performance can sometimes occur. Starting with simple checks—like the fob battery—before adjusting technical parameters such as power output level can often resolve the issue. However, if the problem persists, switching to a more stable alternative key type or OEM solution may be the most reliable fix.
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