Hesitation problem at various speeds (TSB info post #159)
#361
Instructor
iTrader: (1)
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Interesting. I had a similar issue with my 2010. I always try to avoid the first year of a car, but the timing was wrong. No droning, but occasionally I would need to merge or make a turn into traffic, mat the throttle, and get absolutely nothing. Between that and the lazy, easily confused transmission (I really don't drive in a manner an RX is intended), I didn't want another one of that generation. I was considering a newer one, but if those issues have carried over, I might be better off in a CPO GS AWD.
#362
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Sounds like what happened to me. Try disconnecting the battery to see if it comes back. I took mine back to the dealer when I discovered this. If I knew all you had to do is disconnect the battery I would have done it myself. By the way, the hesitation problem has not been fixed either. Wait till it revs up to 2800 and won't change gears...That's when I knew something wasn't right.
#363
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Apparently the instruction don't say to do the battery. However, any software upgrade requires a reboot. Yes they should just know this!
#364
Advanced
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Lexus Technical Service Bulletin number L-SB-0109-17 is now available from Lexus. I had it uploaded into my 2016 RX350's computer today and the transmission hesitation is now gone and the shifting is so much smoother. The 8 speed now shifts like it should have from the beginning. The senior Tech at my local dealer said it was finally approved by the EPA this week.
#365
Driver School Candidate
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I look at the TSB and my 2017 RX350 did not fall under the VIN# mention on the TSB. I been using Regular since I got the Car in Nov 2016 (current miles ~5k). Last 2 fill ups I decided to put Shell 91 and can see a marked improvement in the hesitation and knocking.
I am due for an oil change in few weeks I will ask the service advisor abut this TSB and should I get it done even though my VIN# dosent fall under the mentioned range of VIN#s.
I am due for an oil change in few weeks I will ask the service advisor abut this TSB and should I get it done even though my VIN# dosent fall under the mentioned range of VIN#s.
#366
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I dont understand why you need to disconnect the battery. I use to load different tunes in my Challenger all the time.
It would just overwrite the existing tune. The eproms In these cars are fully erasable and can be written over
many times. All their really doing is loading different parameters in the TCM. Should not require a battery disconnect.
It would just overwrite the existing tune. The eproms In these cars are fully erasable and can be written over
many times. All their really doing is loading different parameters in the TCM. Should not require a battery disconnect.
#367
Driver School Candidate
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Hi Guys. My 2017 RX comes with the TSB applied. However, my MPG is terrible. Lexus says i should be getting 12.2 l/100 in city and 8.9 l/100 on hwy. I am getting 14.5 in city (driving in eco with a light foot). A friend of mine has the RX and without the TSB, he is getting the advertised MPG. I understand that driving habits matter a lot and all i can say is that i used to drive the ES 300H before and have managed to get 5.5 l/100 - so yes, am light footed most of the time.
I am wondering if anyone who has applied the TSB is noticing changes to their MPG?
I am wondering if anyone who has applied the TSB is noticing changes to their MPG?
#368
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Hi Guys. My 2017 RX comes with the TSB applied. However, my MPG is terrible. Lexus says i should be getting 12.2 l/100 in city and 8.9 l/100 on hwy. I am getting 14.5 in city (driving in eco with a light foot). A friend of mine has the RX and without the TSB, he is getting the advertised MPG. I understand that driving habits matter a lot and all i can say is that i used to drive the ES 300H before and have managed to get 5.5 l/100 - so yes, am light footed most of the time.
I am wondering if anyone who has applied the TSB is noticing changes to their MPG?
I am wondering if anyone who has applied the TSB is noticing changes to their MPG?
I'm beginning to really regret not getting the Hybrid. Had a loaner CT200h the other day (I know, different car) and on the same daily route I would take with my RX, I was probably doing 3L/100km, while my car is happily chugging 13L/100km...
#370
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I dont understand why you need to disconnect the battery. I use to load different tunes in my Challenger all the time.
It would just overwrite the existing tune. The eproms In these cars are fully erasable and can be written over
many times. All their really doing is loading different parameters in the TCM. Should not require a battery disconnect.
It would just overwrite the existing tune. The eproms In these cars are fully erasable and can be written over
many times. All their really doing is loading different parameters in the TCM. Should not require a battery disconnect.
#371
#372
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What infuriates me the most is hat Lexus knows that there is an issue because the later 2017 models do not do this as consistently as 2016s. Clearly something has changed and the TSB was an attempt to fix the issue but it's not a complete fix. So what is it Lexus, software or hardware or both? No one should let Lexus and its dealers off the hook.
#373
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I dont know why they just didn't leave the 6 speed Auto in there. I have been driving mine exclusively in manual and hold each gear out to about 2500 rpm's and keep the rpms around 2k. That way Im never in the 1500 rpm range where I get some vibration. It performs so much better and never drones and no hesitation. Now For the interesting part, gas mileage, I have seen little to know difference. Still getting around 21mpg in mixed driving. Im pretty sure this is the way I will need to drive it for the remainder of the lease. Really don't believe Lexus is going to do anything and driving it in Auto feels like a sluggesh 4cyl. Definitely not what I thought this car would be like. Should have went for a long test drive before my purchase.
#375
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So, I had the ECU update connected skit a month ago. Right after the update the drone was almost completely gone and the car drives and shifts like it should. The only issue was that my F sport drive modes were gone. Went back to the dealer and they fixed that. But I'm not seeing any more issues after the update, yet. Are you still having issues after the ECU update?