Sport Cruise Control turns on AUTOMATICALLY!

Hi everyone - I'm a new Range Rover owner and very happy about it. I recently purchased a 2009 RR Sport HSE and it has been (mostly) great the past two weeks...

Today on a drive, the cruise control turned on by itself and started to ACCELERATE on its own. I immediately hit the brake and it shut off (as cc should). Kept driving and a few minutes later, the same thing happened. I pulled over, shut the car off, and waited. Still, on my drive home, it did it three more times. Very dangerous and disconcerting. I am sure I did not hit the cc button by accident.

I've searched the internet looking for this same problem but can't seem to find it anywhere. Does anyone know what the problem could be? I am not a mechanic and will be bringing it to the shop where I purchased it tomorrow so any information I can bring to the mechanic will be most helpful.

One thing to note: I noticed last week that the cruise control would not turn on or work when I tried it on the highway.

Thank you!

rockorover said:

Hi everyone - I'm a new Range Rover owner and very happy about it. I recently purchased a 2009 RR Sport HSE and it has been (mostly) great the past two weeks...

Today on a drive, the cruise control turned on by itself and started to ACCELERATE on its own. I immediately hit the brake and it shut off (as cc should). Kept driving and a few minutes later, the same thing happened. I pulled over, shut the car off, and waited. Still, on my drive home, it did it three more times. Very dangerous and disconcerting. I am sure I did not hit the cc button by accident.

I've searched the internet looking for this same problem but can't seem to find it anywhere. Does anyone know what the problem could be? I am not a mechanic and will be bringing it to the shop where I purchased it tomorrow so any information I can bring to the mechanic will be most helpful.

One thing to note: I noticed last week that the cruise control would not turn on or work when I tried it on the highway.

Thank you!

Click to expand...

Welcome to the mad house. Cruise control is no longer a simple function as it used to be. Sounds very dangerous. If the car was bought recently from a dealer, the dealer is liable to fix it at their cost.

Datatek said:

Welcome to the mad house. Cruise control is no longer a simple function as it used to be. Sounds very dangerous. If the car was bought recently from a dealer, the dealer is liable to fix it at their cost.

Click to expand...

Thanks for the welcome - I knew what I was getting myself into... I'm bringing it to the dealer tomorrow. Still haven't found a single thing online about this issue. I think this car might make a mechanic out of me

welcome

Welcome to the loony zone. As data says sounds extremely dangerous. I'd get the dealer to come and transport it back

Rubberknees said:

Welcome to the loony zone. As data says sounds extremely dangerous. I'd get the dealer to come and transport it back

Click to expand...

+1 to that and thinking about it, I would also report it to the ministry of transport, people have died as a result of faults like that in the USA on other makes of vehicle.

Update: It's in the dealer's hands. Plugged it in and got an error code connected to the cruise control (no surprise). Waiting on complete diagnosis...

Adaptive cruise?

I said this once before, one winter very cold one, I started it up (I think I put it into drive) and it just surges forward with no input from me, slammed my foot on the brake and stopped

lynall said:

Adaptive cruise?

Click to expand...

No Adaptive cruise on mine

Dopey said:

I said this once before, one winter very cold one, I started it up (I think I put it into drive) and it just surges forward with no input from me, slammed my foot on the brake and stopped

Click to expand...

And then what?? Did it ever happen again? It wasn't cold when mine did this - and it had been running for 45 minutes.

rockorover said:

And then what?? Did it ever happen again? It wasn't cold when mine did this - and it had been running for 45 minutes.

Click to expand...

Yours is different technology to the old P38, much more electronic stuff to go wrong.

UPDATE:
When plugged into the computer, it gets error code:
P0579-29 "Speed Control malfunction"

We replaced the clock spring with one from another '09. That made the error go away and got the cc working again! I was driving home happily and all of a sudden, cc turned on by itself again and accelerated all by itself...

Brought it to a shop with a Land Rover computer so that we could disable the cc. For some reason, it was not allowing us to turn it off...

Going to bring it to an electrical specialist tomorrow to see if they can find anything.

If anyone has any insight or has ever heard of this issue, please chime in with any insight. Thanks and wish me luck

As I said before, if you bought this from a dealer, throw it back at them as not fit for purpose. The car is clearly dangerous.

While it’s messing about, reduce the speed it’s trying to achieve down to 30 mph, it will stop all the surging!

Another thought, you are driving a car known to you to be dangerous, this could invalidate your insurance, it could even leave you open to prosecution in the event of an accident.

Datatek said:

As I said before, if you bought this from a dealer, throw it back at them as not fit for purpose. The car is clearly dangerous.

Click to expand...

It is in the dealers hands - they are the ones working to fix it, at their cost.

it's probably got a virus !! or perhaps the Playstation is taking over ?

rockorover said:

And then what?? Did it ever happen again? It wasn't cold when mine did this - and it had been running for 45 minutes.

Click to expand...

In all happened 2 time, always when very cold, and it was just from start up, I turned it off and started it up again, and it went