Park assist going haywire in rain
01-15-19 | 07:16 PM
#31
Advanced
Joined: Apr 2017
Posts: 680
Likes: 159
From: NSW
I've brought my RX F-Sport to the dealership a few times already regarding the clean your sensors error message. My car is garaged and kept reasonably clean. My latest appointment, I drove with a technician and showed him my recorded videos (Car was spotless in the videos. I did a walk around of the car and zoomed in on the sensors). He states, "In my 11 years, I have yet to replace one. The sensors are programmed more sensitive now and it's normal to get the warning message in rainy or inclement conditions." I got the car back after they ran diagnostics and everything was deemed to be normal.
Here are my two scenarios when the message to clean the ICS sensors appears. The sensors operate normally when there is dirt or snow. After a hard rain shower or light rain, however, I begin to see the error message.
(1) Sunny weather. Car is parked in a parking lot. It starts to rain while I am gone
(2) I return and start up the car (no error message to clean my sensors)
(3) Put in reverse (no error message)
(4) Put in drive and start driving (error message from parking sensors that I am closed to a front object pops up first. Then error message to clean my sensors starts nonstop)
(5) Turn off car (error message goes away)
(6) Repeat (same situation)
The other scenario is
(1) Drive on the highway in heavy rain (no error message)
(2) Slow down and exit to about 15-20 mph (error message starts appearing telling me to clean the ICS sensors)
(3) Come to complete stop at a light (error message exists, but then goes away)
(4) Start driving again from complete stop (error message appears)
(5) If I go back onto the highway and start driving faster, the error message goes away
As an owner of several Lexus vehicles, I am baffled that my local Lexus dealership has refused to do anything. I have the scenarios documented. Also, I have many recorded videos to show when the warning displays. My Lexus dealership won't replaced any of the sensors because they say the sensors are operating normally. I believe the issue has to be with one or more of the front sensors. I have a F-Sport model. I believe due to the design of the grille, there could be a leak or an opened seal around the sensors. I carry microfiber cloths to wipe the sensors when I get the message. However, that doesn't appear to help as long as it's raining.
Here are my two scenarios when the message to clean the ICS sensors appears. The sensors operate normally when there is dirt or snow. After a hard rain shower or light rain, however, I begin to see the error message.
(1) Sunny weather. Car is parked in a parking lot. It starts to rain while I am gone
(2) I return and start up the car (no error message to clean my sensors)
(3) Put in reverse (no error message)
(4) Put in drive and start driving (error message from parking sensors that I am closed to a front object pops up first. Then error message to clean my sensors starts nonstop)
(5) Turn off car (error message goes away)
(6) Repeat (same situation)
The other scenario is
(1) Drive on the highway in heavy rain (no error message)
(2) Slow down and exit to about 15-20 mph (error message starts appearing telling me to clean the ICS sensors)
(3) Come to complete stop at a light (error message exists, but then goes away)
(4) Start driving again from complete stop (error message appears)
(5) If I go back onto the highway and start driving faster, the error message goes away
As an owner of several Lexus vehicles, I am baffled that my local Lexus dealership has refused to do anything. I have the scenarios documented. Also, I have many recorded videos to show when the warning displays. My Lexus dealership won't replaced any of the sensors because they say the sensors are operating normally. I believe the issue has to be with one or more of the front sensors. I have a F-Sport model. I believe due to the design of the grille, there could be a leak or an opened seal around the sensors. I carry microfiber cloths to wipe the sensors when I get the message. However, that doesn't appear to help as long as it's raining.
06-05-19 | 04:00 PM
#34
Driver School Candidate
Joined: Jun 2019
Posts: 1
Likes: 0
From: Texas
I have a 2015 GX with the same problem. Heavy rain...the middle front sensor goes off when the car is in drive and stopped or not moving very fast. When I go over 3 mph it stops beeping....until I slow down or stop...then it starts beeping again. It's happened 3-4 times in the last few years - all associated with big rain events. We get a lot of rain here but it's a rare problem. I expect it to stop going off in a day or two. From the above discussion it's clearly a moisture issue. My repair guy saw the problem and was puzzled. It's not worth replacing the sensor so we'll move to Arizona...
06-06-19 | 08:05 AM
#35
Rookie
Joined: Jan 2005
Posts: 71
Likes: 1
From: VA
I too have experienced this issue. Moderate to hard rain will trigger my sensor. Sometimes to the point where I have to disable it. But other time while driving in the rain, it's fine. :-/ Glad to see I'm not the only having this issue.
06-06-19 | 08:18 AM
#36
Instructor
Joined: Mar 2012
Posts: 1,187
Likes: 126
From: or
06-06-19 | 08:29 AM
#37
Racer
Joined: Nov 2017
Posts: 1,803
Likes: 515
From: New York
The following users liked this post:
mcomer (12-16-20)
08-17-20 | 01:28 PM
#38
Driver School Candidate
Joined: Aug 2020
Posts: 3
Likes: 2
From: Herts, UK
Just thought I'd let you know I get the same problem here in the UK. :-(
My 2013 F-Sport has done this several times now and always after a particularly heavy downpour - I've not experienced it happening whilst out driving.
Interestingly, I don't get any error message - and the problem usually seems to disappear when the car dries out...
Touch wood, that's what happens this time....
In the meantime, I've now found out how to disable the sensors temporarily - because I find the beep-beep is very distracting when there's nothing near you and you're not parking!
My 2013 F-Sport has done this several times now and always after a particularly heavy downpour - I've not experienced it happening whilst out driving.
Interestingly, I don't get any error message - and the problem usually seems to disappear when the car dries out...
Touch wood, that's what happens this time....
In the meantime, I've now found out how to disable the sensors temporarily - because I find the beep-beep is very distracting when there's nothing near you and you're not parking!
08-17-20 | 01:39 PM
#39
Instructor
Joined: Sep 2015
Posts: 977
Likes: 693
From: Ohio
I saw this message once (so far) on my 2018, while driving in a deluge of rain. When I got home and parked in my garage, I used a towel to dry the sensors, and I haven't seen it again. I assume that's the way it's supposed to work.
11-28-20 | 05:57 PM
#40
Driver
Joined: Dec 2011
Posts: 147
Likes: 27
From: TX
I’m going to remove the bumper (it’s very easy to do this) and dry the water off and clean sensors with a leaf blower and apply extra waterproofing tape around the connectors of the sensors. I recently upgraded to the F sport front bumper too.
12-16-20 | 08:32 AM
#42
Driver
Joined: Jun 2019
Posts: 161
Likes: 19
From: NJ
i just bought a rx 350 (first time Lexus buyer), i like the car but there might something wrong with my parking assist. Normally, the park assist works fine but on raining days, the sensors would go haywire with message like sensors are dirty need cleaning or detecting object in the front and back that doesn't exist (not even heavy rain).
I am just wondering is this normal, has anyone else had a similar experience?
I am just wondering is this normal, has anyone else had a similar experience?
02-18-24 | 10:18 AM
#43
1st Gear
Joined: Feb 2024
Posts: 1
Likes: 0
From: Florida
we have had this issues repeatedly with our 2018 RX350 F Sport - the dealer FINALLY replaced all sensors - It is STILL happening! Dealer cannot seem to figure out how to fix it.
02-18-24 | 12:27 PM
#44
Advanced
Joined: Apr 2017
Posts: 680
Likes: 159
From: NSW
02-18-24 | 12:46 PM
#45
Racer
Joined: Nov 2017
Posts: 1,803
Likes: 515
From: New York
