[BibiBerries]

Hi all 👋,
Have a strange issue with my car immobiliser on my Hyundai i30 2010 (59):-
- Can jumpstart car but when switch off engine the car with key symbol stays on permanently (not flickering). 
- Car cranks but doesn't start with key.
- Auto Locksmith doesn't think ECU / immobiliser reprograming issue. 
- New fully charged battery & new batteries in keys.
- Jumpstarts after a few goes with both of my keys so? 
- I can open the doors with both of my car keys. 
- Recently had a parking (passenger side) lightbulb change..

Anyone got any clues as to what the root cause/problem is?? 🤔

[Lorian]

maybe the very common on 59 cars intermittent key antenna fault in the control column? do a search lots got replaced about a decade ago

[Greyhound]

@Lorian is this an example of ignition key antenna issue you referred to?
Immobiliser coil antenna replacement