Kia Maintenance Questions? Ask a Mechanic for Answers ASAP
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Warning you of no key present after 50 miles is not normal, that should never be normal, it's a big FAIL by Kia if key proximity is only checked once. I have a VW Golf, I started the car and then went back into my house and left the key in the back yard by mistake and the "no key present" come on the dashboard after 20 meters of driving. 10 seconds later, the engine turned off.
This needs to be questioned because it is an anti-theft feature.