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Hi,

We just took our 2015 NX200t AWD to Tahoe over the break and as soon as we encountered a little bit snow and the slightest ice a message appeared:

"AWD system has overheated - switching to 2WD"

Continued to drive in 2WD up until we reached the cabin.
Parked the car in the garage over night.

Backed out of garage in morning on to the main road, the temp was about 5 F. After 10s a new message appeared:

"AWD system Malfunction - 2wd mode engaged"

Then we got stuck on the road - only front wheels spinning. Then we started sliding backward into ditch.

Very disappointed.:(

Dealer took a look at it after we got back to the Bay Area. Cleared the codes and said it passed all tests. I.e. no repair. Sigh.

Don't want to take it up in the snow anymore. Useless.

Still working with the dealer for some sort of resolution.


R.
 

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I just encountered the same problem with my 2015 NX200t AWD last night. There was a bad traffic on the high way last night. When I almost passed the traffic jam, the engine check light suddenly went on. It gave me an error message as "AWD system Malfunction - 2wd mode engaged". So I drove my car off the high way and parked it in front of a store. I turned the engine off and back on. The message did not go away. Then I drove it in a low speed back to home. I felt there was something wrong with the drive train or transmission or differential because the acceleration does not function well. I could not accelerate it up to 50 miles. I will drive my car to the dealer to check it out. Very frustrated.................
 

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AWD system malfunction

Why all the AWD system malfunctions? I was leaving for a doctors appointment and my 2016 Lexus won't start. Same message. AWD system malfunction and 2WD engaged. Car won't start. I'm curious if this is a system error due to a problem beyond our control. Seems like it might be a factory issue. Anyone else? I have Lexus roadside assistance on their way now. They think its a battery problem. Everything lights up, radio works, all lights are bright and not flickering or dimming. I'll be shocked if that's the problem.
 

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So I will answer my own question above. It was the battery. Even though nothing was left running the battery was low enough that it would not start the car. All those messages and malfunctions were due to the battery. Lexus Road Service brought a new battery and said this is very common with factory batteries. I think they should do something about that then, don't you? I was so glad I was home and not on the road.
 

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I just encountered the same problem with my 2015 NX200t AWD last night. There was a bad traffic on the high way last night. When I almost passed the traffic jam, the engine check light suddenly went on. It gave me an error message as "AWD system Malfunction - 2wd mode engaged". So I drove my car off the high way and parked it in front of a store. I turned the engine off and back on. The message did not go away. Then I drove it in a low speed back to home. I felt there was something wrong with the drive train or transmission or differential because the acceleration does not function well. I could not accelerate it up to 50 miles. I will drive my car to the dealer to check it out. Very frustrated.................
Hi was your problem fixed ?
 

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My nx200t died when approaching my house. The engine showed AWD malfunction, engine performance has been reduced, visit dealer. The engine light was on. Car would start but with no power.... It stalled 4 times before j got home.

Plugged in my OBD Scanner and it seems to be fuel pump failure. Did a quick Google search and Toyota recalled over 3 million cars including some Lexus NX for fuel pump failure which would either, not start the car at all, stall the car while in motion, reduce engine power, any issue the vehicle will disable AWD. I'm surprised my 2016 nx was never recalled... Towed it to Lexus dealer yesterday and waiting to see the outcome.

Quite dangerous as I just came off a 50km highway drive....in the middle of the night in bloody South Africa.... If the car stalled I would have been robbed.... Or killed....

So much so for Lexus reliability.... But then again I've never experienced a single issue with this car for the past 6 years almost at 150k km,only had 2 battery replacement. My 2016 Volvo xc90 D5 on the other hand had replacement on.... Alternator, engine mount, both twin turbo, EGR, torque rod.... List so long... I think almost Half the engine compartment was replaced under warranty...

Anyways, all my dudes with NX , watch out for that fuel pump issue....I would change it out in next big service....

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