500L Car going into Limp mode while driving

[carriewalker1456]

Hi,

I need help, my car goes into Limp mode while driving, from 75 miles to zero.

I am having to pull over to side of the road and cut car off and restart and it works. But sometimes I am not able to do that and pray no one rear end me while sitting in middle of highway restarting the car.

I taken it to one shop after another and replace Turbo Charger and sensor and ABS modular and nothing is working.

I am getting lots of errors messages.

I call the local dealer and they say they can not reprogram my computer only updates. I have all the updates.

Feel like it a shortage in computer because to get by going is just a restart.

I do not know what to do next. I see all over the internet where this is happening but no answer to what to do to fix.

Help in Texas.

 

[Telegraph]

Hi that sounds it will be a small fault that might take some tracking down.
I would first check the battery and its connections especially the earth/ground lead to the engine and the alternator can play up. there are a number of small things that will put you in the get me home mode crank sensor and the air mass sensor (which can be cleaned) are old favourites.

 

[MaxHeadroom]

Hello Carrie and welcome to the forums.
Sorry to hear you have some bother which, as you suggest could be potentially dangerous.

I'd second everything that Telegraph has already suggested; check the battery terminals are tight (and that they are not corroded - clean off any corrosion with an abrasive such as Scotch-Brite).
Same with the earthing strap from the engine to the chassis/bodywork, make sure its not broken or the connections are not corroded and that its on securely. (I had a friend with an Alfa Romeo years ago that had no end of problems because of the engine/bodywork earth strap).

I personally favour using a battery terminal grease such as Liqui-Moly on all electrical connections to inhibit future corrosion.

Then, as Telegraph suggests start looking at the sensors. Sometimes when these become old and get hot they start acting up.