Brand new car - Blindspot Information System Failure

pbook4g5 said:

Brand new 2019 Accord Sport 2.0 6MT with 350 miles on it and I get in yesterday morning and a message appears on the dash telling me that there is a problem with the Blindspot Information System and to take the car to a dealer. It had just snowed the night before and I wasn't exactly sure where the sensors were as I had snow on my rear deck that I didn't knock off completely.

No snow on the bumper (where I thought the sensors were) and the car was clean. Took it into my local dealer and they took 3 hours to pull a code from the BSI unit - Code U1297. Didn't tell me what it meant, but that they needed my car for "a couple of days to diagnose the issue" and then "another day or two to fix it." Having had the car for 9 days total, this was not a great answer. And to top it off, my local dealer would not give me a loaner since I didn't buy the car through them.

So not too thrilled with the car at the moment. Still runs great, just a PITA to have to deal with it. Another local dealer is going to take the car Monday and give me a loaner while they figure it out.

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My guess is the snow caused your problem. Did it go away after the snow melted? I would think that if the sensor was blocked, it would simply light the light to show it thought a car was in your blind spot. But I think the sensors are smarter than that. I've put 6K miles on my car so far (2018 Sport 2.0 6MT). I have had maybe 3 times where the "BRAKE" light lit up when nothing was in front of me. I have found a few roads/examples where the sensors get confused. I think the Honda system is pretty good but not 100% perfect. We're still in 1st gen technology with this stuff. I have also had some slush spray from the road block the radar array in the lower front grill and I had to wipe it off to restore forward collission warning. The tach lit up the warning that the sensor was blocked so it was a 10 second fix.
Good luck!

ZipZap said:

Pretty common with Honda and Acura. Guess they dont test in the real world. My Acura brake warning would go off when I approach overpasses. Good thing it did not actually brake.

As for the other issue. A few weeks back all of those systems shut down after a 30 min drive in clear sunny weather. Pulled over, shut off car, and turned it back on. No issues since. So dont rush to the dealer.

I have even had false TPMS firings.

If this gets worse, this car will be sold. I am not a beta tester for Honda. These systems should work flawlessly.

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Yeah, my issue has taken another turn... for the worse. Here's an update since my last post.

Not happy with the first dealer, I scheduled the appointment to take it to our other local dealer (we have three in the area). In between the time I was scheduled, my backlights on my door lock and window keys started flashing (both sides) like something was shorting.

Drop it off to dealer #2 last Monday (3/11). Tell them all the issues I was having. They give me a loaner and I'm on my way. They call me at 3 in the afternoon. They've determined they need to replace the BSI Sub-system radar unit. They also tell me they can't replicate the blinking backlights but they are going to do an ECU reset to see if that "fixes" the problem (you know, the problem they can't replicate but I could like clockwork).

Get a call the next day at 3. The car is ready to be picked up. Still couldn't replicate the blinking backlight, but the BSI system was now functional. Whatever... I'm happy its fixed and if the lights truly aren't flashing anymore... its a win.

Fast forward to today... 6 days after my car was dropped off and 5 days after the BSI system was repaired. I was driving home from the grocery store, and the BSI system alerts me that there is an error and I need to take my car to the dealer (same message as before). It was snowing earlier in the day, so I thought, again, maybe I had some snow build up. Got out, wiped off the bumpers... nothing. Turned the car on and off... same error. Oh, and guess what? The intermittent flashing backlights are back. So I'm thinking the two things are somehow connected (not sure how, but the lights weren't flashing before the BSI error message came back).

So it's back to the drawing board for me. I'm going to push for a lemon law replacement or refund. In Ohio, it's three times to repair on the same issue and this will technically be the second time, but all the dealer is doing is throwing parts at it.

Will update with whatever I hear from the servicing dealer. Also will call the dealer where I bought it to see what they say. Also might call Honda of America. This is getting stupid.