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front parking sensors - false beep

GMC-AT

By GMC-AT
in Troubleshooting & Recalls

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nfisherman Enthusiast

nfisherman

Posted
Posted

Well I happen to own a 2015 Tundra with front park assist and it does the exact same thing as the Chev... so yes it does happen to other brands... including the holy grail of Toyota. Ice on a sonar based sensor will block the signal so unless you add a heating element to it to keep them clean it is what is. Clean the sensors off and just keep going. Now unless you are experiencing where they are clean and clear and still alarming which points to a sensor fault.

 

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nfisherman Enthusiast

nfisherman

Posted
Posted

I agree with what vmax said. Any brand can have a sensor obstructed with ice, but if you clean the sensors and still have a false alert, there's a problem. That's exactly what happened in my case. For what it's worth, I just called my dealer to cancel the appointment that I had for today. Explained why I was canceling. He agreed that I should wait until it gets wet again so that he can determine which sensor has a problem.

KSTMSTR Enthusiast

KSTMSTR

Posted
Posted

Reading through this thread really makes me glad I don't live where it snows!! Hope you get the faulty sensor replaced when it acts up the next time. Cheers - Rick

Pat C New Member

Pat C

Posted
Posted

VMax,

Interesting to know about your Toyota… Actually, I don't think the truck(Tundra) I had was any better than most of the GM trucks I've owned over the past several decades.

My concern with my new GMC lies with how little residue (a very slight "film" of ice, not packed on snow or ice) it's taking to trip the center units. And it's crazy how the outer sensors don't have this same problem happening, noting that they, too also have the same minuscular layer of ice on them too.… As has already been discussed, I'll simply wait for the same scenario to occur and follow with showing what this looks like to the tech…

No doubt many other owners are having similar problems..

Pat

  • 1 month later...
1 Reg New Member

1 Reg

Posted
Posted

2014 Silverado High Country

I have the same problem, started in the fall with the cold weather. The sensor alarm would go off when driving slow, the service dept got it to do it so they changed the front sensors. It is better now but if the roads are wet the alarm will go off when coming to a stop. Now the dealer tells me that it is normal in the damp weather. The paint is now peeling of the new sensors after about 2000 mi. If they had told me this would happen when I bought the truck I would not have a problem with it, I could have decided then weather to buy the truck or not based on that information. Options are not cheap and if I wanted to give money away I would give it to my favorite charity, not GM.

  • 2 weeks later...
Johnfurlong New Member

Johnfurlong

Posted
Posted

Any brand of truck with them does the same thing. ... Ford, GM, Dodge, Toyota, Nissan... whatever. It's a simple sonar based sensor and ice interferes with it as it blocks it's signal reflection. There is no fix for that beyond cleaning them off, parking the truck where it is warm and letting it thaw etc. There is no problem with either of your trucks so don't waste your dealerships time.... mud also does the same thing.... mind you most people here never drive through it so they wouldn't know. You turn the sensors off and deal with it, case closed. If that is unacceptable or too much effort or whatever sell the truck... and buy one without park assist sensors. Yes they annoy me too as mine are froze up constantly and beeping.... just like my Toyota and my Fords before... but I park inside, they thaw and work again for a while at least the next day.

 

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My company has 2 fords with sonar . Neither go off unless the sensors are completely blocked . My new 2016 sierra they go off for no reason . There is nothing covering them . I can wipe them off but if it rains then freezes water must get behind them and cause it because there is nothing on the surface . Either the sensors are junk or it is a bad design . But our fords do not do this in cold weather unless they are burried over in snow .
  • 1 month later...
UmmDad New Member

UmmDad

Posted
Posted

I've been having the same problem with my 2016 as well. First it started in the winter on my rear bumper sensors and now it's happening in the spring with my front left senor in dry/clear conditions. Took it to service today, will update you guys soon as I get a response.

 

EDIT: Service said they reset the messages, similar to what I read before and they couldn't replicate it so hopefully it's fixed.

theatasigma Enthusiast

theatasigma

Posted
Posted

My company has 2 fords with sonar . Neither go off unless the sensors are completely blocked . My new 2016 sierra they go off for no reason . There is nothing covering them . I can wipe them off but if it rains then freezes water must get behind them and cause it because there is nothing on the surface . Either the sensors are junk or it is a bad design . But our fords do not do this in cold weather unless they are burried over in snow .

I only get the messages when it is iced over thick or covered in snow. I am wondering what other mods (lifts, leveling, tire sizes, etc) people have on those trucks having problems. As far as mine goes, running 18" tires with no lift or leveling. When snow is wet and thick, I also have to clean off the rear bumper as it will set those off too if it falls down over the sensors. I even had these problems on my Escape and LR3 (all rear sensors) in heavy or wet snow.

Vic15 Enthusiast

Vic15

Posted
Posted

My front sensors go off for no reason. There is no ice or water. I can be sitting at a red-light or stop sign and it goes off, no cross traffic & nothing in front of me. This includes the visual on the dash & audio alert. In addition, when I pull up to a car in a parking space or pull up to the front of my garage I get a visual warning on the dash, but no audio. The rear sensors work perfectly.

PenguinSLT New Member

PenguinSLT

Posted
Posted

My 16 has 1000 miles on it and is doing the same thing. Random alerts from left front while sitting still. Rain and snow make it worse, but they have never been covered over when it happened.

  • 1 year later...
2017_LTZ Enthusiast

2017_LTZ

Posted
Posted

Well looks like my truck has the same issue... We finally got a bit of rain here in Cali and my right front sensors have been going off for no reason... I think I'm still gonna swing by my local dealer to see what they tell me...

Bmz72 Enthusiast

Bmz72

Posted
Posted

Well looks like my truck has the same issue... We finally got a bit of rain here in Cali and my right front sensors have been going off for no reason... I think I'm still gonna swing by my local dealer to see what they tell me...

Similar issue with my '16. My dealer performed a service bulliten last time in, better but still get false warning on occassion after being parked during a rain storm.

Bmz72 Enthusiast

Bmz72

Posted
Posted

bulletin number?

Heres the PIT5507B, hopefully this helps, my truck was in on 1/19 and I think it was fairly new back then

Good Luck!

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