Siri not working with CarPlay after iOS 18 Update

For my girlfriend this was due to Messenger. So check you don’t have Siri enabled for too many apps.

I try to disable most apps that offer integration unless it makes sense.

Easy fix to rectify this.

go to settings/general/carplay

delete vehicle/s

then re add car to CarPlay and fixed

IPhone SE and 2020 Forester. Same kind of issues when trying to text hands free with “hey siri”.

I find that if while using CarPlay, I tap on “Messages” and manually select one of my contacts, Siri acts like she used to pre-update.

Not ideal or safe while driving of course, but it seems like it’s definitely a new update issue.

I had this same issue with my 16 Pro Max using a wireless CarPlay adapter with my 22 Hyundai Palisade. I did a power reset on my phone and it fixed the issue.

Siri Stopped working entirely after I updated my iPhone 16 Pro to iOS 18, when you call Siri, the icon will prop up, however, it will disappear as soon as you’re done speaking without any response.

what fixed it for me was simply turning the iPhone off and back on again.

iPhone 11, iOS 18, Subaru Forester 2023. Same problem. Siri can't speak.

If I ask Siri something when connected to CarPlay, the Siri globe shows up, but Siri doesn't reply by voice.

Google Maps navigation works fine in that directions are spoken, but Siri is clearly broken after the iOS 18 update.

Disconnecting from CarPlay makes Siri function just fine. So it's a Siri + CarPlay + iOS 18 problem.

I have found in my Toyota 2023 RAV4 I have to say Siri twice for it to work. First time you get the bubble, but it takes the second Siri to get it to respond. I have my iPhone 16 Pro Max set to respond to Siri or Hey Siri. I am going to try setting it to Hey Siri to see if that helps.

I have the same problem on my Honda Accord 2024 after updating to iOS 18 and 18.1 I did try resetting the infotainment system which I had to do a few times for other things. That seemed ro fix it temporarily where “hey Siri” “Siri” worked. But a little while later it stops working again. I can push a name on the screen to send a text and that seems to work with Siri. Another issue though I extended the time, sometimes I have to talk super fast if I don’t or take a 1/2 a second pause it thinks I’m done and gets ready to send. I know this is two separate issues but both popping up with the new iOS update.

I don't see anyone with a (maybe newer) Minicooper responding, so I'll say that that brand is also subject to this Siri issue of the system not vocally hearing "Hey Siri" and responding with "Hmmm" or something in CarPlay mode. You have to push the mic button for three seconds, and even that is dicey.

Although it is intermittent...it's super annoying...

UPDATE: if I reboot the head unit Siri then responds to voice commands. But once the car is restarted Siri no longer responds and the head has to be rebooted again. I think it is Honda’s issue.

Similar problems after iOS 18 upgrade. 2022 VW ID.4 and iPhone 15 Pro Max, connected wirelessly to CarPlay. When Siri activates from the car system, for example to read a text message, the system freezes for about 30 seconds and then CarPlay disconnects and eventually automatically reconnects. When I try to use voice to text directly on the phone it also freezes and then CarPlay disconnects. Forgetting both sides, restarting and reconnecting doesn’t help. This makes CarPlay 100% unusable, I have to drive with the phone disconnected. No VPN. Voice Control and Vocal Shortcuts not enabled.

Same issue, 2021 Subaru Crosstrek. So it works if you hold the talk button on the steering wheel or you push and hold the square at the bottom left of the screen. The "hey siri" feature doesn't voice respond back but siri does do what I ask just doesn't say anything. Example "Hey Siri, play spotify." She'll play Spotify but not tell me she's doing it. The biggest annoyance with this is talk texting because you can't review what is sending or when you need to hear what she's saying back to you such as confirming a reminder.

18.0.1 did not fix this, Apple please make sure 18.0.2 fixes this issue. Superrrr annoying!!!

So let’s try this again. My last post was removed, even though it contained GOOD NEWS?!

In regards to your workaround, people shouldn’t have to limit their privacy or change anything in order for CarPlay to fix. I’d have to try it to be safe, but for now the speaker button on the steering wheel is fine for now.

The next major update includes a fix. I’m testing out the first public release and Siri is working fine. I do not recommend trying it out unless you’re okay with any bugs, which I thankfully haven’t run into as of yet.

Please don’t remove this post Apple as that’s just plain censorship and I’m trying to help people out here by spreading the good news…

Sadly, the fix only lasted through one cycle of turning the car off then on. After that Siri once again does not respond to voice commands just the long press on the steering wheel button.

1. Solution: reboot the head unit every time after starting the car.

2. Give up and wait for Apple to fix it in an update while they ignore the problem.

The only way it works is to use the command button on the steering wheel. So much for being able to just use your voice.