My Scangauge shows code U0447. Searching for that gives me cruise control or invalid data. I'm just going to call LR and get a tow truck to take it to the nearest dealer. I'd think a faulty cruise control sensor/switch/whatever would be under warranty.
Very high idle, 2800 RPM
- Thread starter BrianTN
- Start date
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jlach993
Full Access Member
I have a good feeling it's your throttle position sensor out of wack.
My wife relayed some information and apparently there is a vacuum leak somewhere and it is covered under CPO. The battery "needs" replaced for over $400. I enjoy working on my truck and can change the battery, but is there a way to reprogram the computer myself without the IIDTool?
jlach993
Full Access Member
Not too sure if you could without the tool, i'm sure others on the forum could chime in. That being said, I've changed the factory stock H7 stock Varta battery that came with my MY2011 back in 2014 to a H8 Duralast AGM battery from autozone for a little under $200. I just popped the old one out and fit the new one in. I just had to reset the one touch power window function and sunroof function and that was it. I never got around to resetting the BMS on the truck. It's been 4 years later and 40k miles and everything is still in tip top shape. I'm sure others will say that the charging system needs to register the new battery to come up with a new charging profile, but i think the truck automatically "learns" that a new battery was installed and adjusts the charging profile accordingly after a few hundred miles.
jlach993
Full Access Member
Wordddd
Keith Hollis
Member
Check the air intake - what we call the "snorkel". The rubber boots have a tendency to wear through if in contact with the engine cover, and there are other "leaks" we've detected by smoke test on these as well.
If it's drawing in too much air it's running lean and it will throw a check engine light.
If it's drawing in too much air it's running lean and it will throw a check engine light.
KH 2014 RR Sport
Member
Hi, I’m having something very similar. Did you find out what this was?
jlglr4
Full Access Member
@KH 2014 RR Sport - I think you’ll need to provide a little more info. The response you quoted was about replacing a battery, but the majority of the thread is about a high idle problem. Are you looking for help on the high idle or replacing the battery?
