Proximity Sensor wont turn off

[Cutonadime]

Hey guys,
I got a problem and I’m afraid the dealership is gonna milk me for it to get repaired.
My proximity sensor on the right corner is going off and won’t turn off. There’s no obstructions and it’s clean. Well except for a tiny rockchip…which I suspect is causing the problem. Anyone have a issue like this with their sensors? Can I just unplug and replug it and see if it corrects itself?

It’s a 2015 Q70S btw

[VStar650CL]

Doubtful that replugging it will help, but unplugging it should shut the system up till you can replace it. Easy job with a small hook tool, the sensor is held in from behind with plastic pawls.

[mattd1979]

I don’t mean to hijack the thread but I am having the same issue at the front and was wondering if the sensors need to be recalibrated with each other after replacing them? The dealer wants $1300 parts and labor to replace both front.

[VStar650CL]

I don’t mean to hijack the thread but I am having the same issue at the front and was wondering if the sensors need to be recalibrated with each other after replacing them? The dealer wants $1300 parts and labor to replace both front.

Nope, N/I sonar sensors have their own smartwork built-in. No calibration needed. Cameras and front radars are a different story.

[VStar650CL]

Nope, N/I sonar sensors have their own smartwork built-in. No calibration needed. Cameras and front radars are a different story.

Well, caveat. If this is for your '90, Identifix doesn't even have any documentation that it had sonar. Some of the earliest systems were pretty screwy and complicated by today's standards, so it could be very different from the OP's situation.

[Cutonadime]

Got some updates for you guys. Got it fixed at the dealership the next day. Couldn’t handle the beeping

$666.44 CAD part plus labor cost. ~3hr total wait
$314.77CAD for the 1 sensor assembly.
Part No. 28438-4H3A
The service description was from the tech as reported: Faulty sonar sensor- right outer front has 2 impact marks.This may be enough to cause issue but there seems to be a very small dent on the surface. When on data monitor, found all sensor respond except the corner front. When completely blocked the reading goes to normal indicating faulty sensor. No damage found to the connector or corrosion on pins.

Annoying part is that I have an extended warranty and the desk said it WOULD have been covered have there been no impact marks. I was at the dealership for 3hrs total; got some of rear stabilizer connecting rods (part no. 54618-1MA0B/54668-1MA0B/11258D0101) replaced and links replaced which were covered under warranty.I think those parts are like $30USD.

So yah it’s working now, no issues so far. Expensive 3 hour visit to the stealership and it was probably the rock chip and uneven surface on the sensor that caused the sonar to act up.
BTW all this done on Q70S gunmetal color for anyone in the future looking for info.

[VStar650CL]

Expensive 3 hour visit to the stealership and it was probably the rock chip and uneven surface on the sensor that caused the sonar to act up.

The piezo elements inside the sensors are ceramic, chances are it was cracked internally by whatever impact dented the face. When that happens they literally rattle themselves into self-triggering when they transmit. If you have road hazard on your main insurance policy, you might want to see if that would cover it.

[mattd1979]

Nope, N/I sonar sensors have their own smartwork built-in. No calibration needed. Cameras and front radars are a different story.

Well, caveat. If this is for your '90, Identifix doesn't even have any documentation that it had sonar. Some of the earliest systems were pretty screwy and complicated by today's standards, so it could be very different from the OP's situation.

Lol, the issue is with a 2015 Q70L that I bought a few months ago. I just haven’t updated my signature yet. And the cost for each sensor is $335.33. I think I can find be cheaper myself and with labor included driving up the price to $1300 for two sensors included I believe I will do that myself as well if no calibration is involved.

[VStar650CL]

the cost for each sensor is $335.33. I think I can find be cheaper myself and with labor included driving up the price to $1300 for two sensors included I believe I will do that myself as well if no calibration is involved.

Depending on the color, InfinitiPartsDeal has them for between $157~300. Gray is the priciest, grayish-blue is cheapest. The manual indicates there's nothing wrong with repainting as long as it isn't laid on thick, so you can get the cheapest color and spray it with touchup if you want. As I mentioned above, they're only held into the bumper covers with pawls, so swapping them out is easy as long as the particular sensor isn't in a buried spot. I just double-checked the R&R in the manual and there's definitely no calibration involved.

[mattd1979]

Okay thanks. I contacted a another local Infiniti dealer and gave him the last 8 digits of the VIN so that I could get the correct part number and what he gave me comes up for a Q50 and states it won’t fit my vehicle. The part number given is 28438-4HB6A.

The two sets of numbers I came up with are…
28438-3JA1A White 3P(Replaced with 28438-4GA6C)
28438-3TA2E -Pearl White 3P

My paint code is QAA I believe for moonlight white.

[VStar650CL]

For a '15 Q70L, IPD lists 25994-1BA3E, only one white version. You're looking at the whole assembly with mount, but unless your mount is damaged you should only need the sensor.

[Cutonadime]

Lol, the issue is with a 2015 Q70L that I bought a few months ago. I just haven’t updated my signature yet. And the cost for each sensor is $335.33. I think I can find be cheaper myself and with labor included driving up the price to $1300 for two sensors included I believe I will do that myself as well if no calibration is involved.

If you do tackle this solo hook us up with a walk through on how to do it. It’ll come in handy for anybody looking for a fix to this for sure.
I was looking and it looks like through the wheel liner is quickest way to access the corners but the center two looks more difficult. Let us know and good luck.

[VStar650CL]

I was looking and it looks like through the wheel liner is quickest way to access the corners but the center two looks more difficult. Let us know and good luck.

The rear sensors on most models can be accessed just by crawling under the bumper, and for front outboards you can take loose the front part of the wheel well cover where it attaches to the bumper cover and bend it back. Center fronts can be awkward, on some models you may need to take one side of the bumper cover loose. Before messing with a front one, I suggest practicing by removing one of your rear ones so you have an idea where the pawls are and how they work. It's easy stuff, but not blind in the dark on the first try.

[mattd1979]

For a '15 Q70L, IPD lists 25994-1BA3E, only one white version. You're looking at the whole assembly with mount, but unless your mount is damaged you should only need the sensor.

I just received a screenshot of the front parking sensor part number from the Infiniti dealer that has my car and it is 28438-4HB6A. So even they are pulling up a sensor for a Q50. Unless the one at IPD is labeled incorrectly?

[VStar650CL]

I dunno, IPD shows that as a no-fit for a generic '15 Q70L, but there's a production date cutoff so maybe your VIN calls for a different part. IPD uses the Infiniti DPC database and drawings, so I don't get the discrepancy. It's a little odd that the part description is different also, the 25994-1BA3E comes up as "Electrical Unit Sonar Sensor Assy" and fits a big bunch of stuff from '08~17, while the 28438-4HB6A comes up as "Distance Sensor Assembly" and fits '14~16 Q50 only. So if that's what really fits your vehicle, I have no idea why. Have you tried plugging your VIN into IPD?