Remote Key Question - Hard to Figure Out What';s Going On

[thom4782]

Hi All:

Looking for some educated guesses.

My two keys work intermittently. Sometimes when they don't, I'll open the car using the door lock and then the keys work fine for a day or two. Problem with this theory is that the time between uses is too short for the car to switch modes from remote to you must put the key in the door lock.

Theory 2: The key are wearing out. Well that's fine for the key I use everyday. But I see the problem with the spare which has less than 50 clicks on the buttons.

Sometimes the key will work close to the car and other times the key will work from 50+ feet away. It could be a weak battery, but I've changed batteries several times and doing this didn't help.

So I am baffled. Can anyone suggest what else might be triggering this problem. The one other thing to know is I recently changed the radio to a Pioneer double DIN unit with GPS. Could the GPS antenna location be part of the issue. It's located under the hood at the far right side.

Or could there be a grounding problem that affects how the keys work.

At this point I'm at a loss