Apple CarPlay maps/gps accuracy issue

Green Coconut

Registered

I have a late 2020 T-Roc 1.5 United with MIB3. Apple CarPlay navigation is pretty much unusable due to unreliable location information shown in whatever mapping app I choose. I have tried Apple Maps, Google Maps, Here Maps and Waze. All exhibit the same problem where the gps location is off by what I estimate to be between 30m to 3km. I can’t see any pattern in when the fault will occur, sometimes in the first few minutes of a drive and other times after hours. I have changed my iPhone and my network thinking the phone was a fault. I have tried plugging the phone in and using it wireless to the same effect. All available software updates are applied to the car and the phone. I don’t have SatNav activated in the car to see if that works (I don’t fancy a £400+ experiment). The phone reports its location accurately so I have narrowed it down to the car itself.

Dealer was useless and their fix was to uninstall software updates (which made no difference).

Before I brave the dealership again, I was wondering if this issue has been seen by anyone else and if they have found a solution?

Thanks in advance.

twist

Super Moderator

peterh

Registered

Hawkeye

Registered

R-Line 2.0TSi DSG 4MOTION
Silver White with Black Roof
Panoramic Sunroof
‘Beats’ Sound system
Electric Tailgate
Rear View Camera
Park Assist
Driver Assistance Pack Plus

Ordered 20-10-18
Collected 19-03-19

twist

Super Moderator

peterh

Registered

twist

Super Moderator

peterh

Registered

Impala

Super Moderator

OK, so I can use Google Maps or Waze on my phone when nowhere near my car and so these navigation apps presumably use the phone’s GPS. That seems sensible as it means that the apps can be used for navigation in ANY car and not just ones which support CarPlay and Android Auto, as well as when cycling or walking.

So are you saying that if I then connect my phone to use my car’s display using CarPlay or Android Auto, those navigation apps will switch from using the phone’s GPS to using the car’s ? Why would they choose to do that and add another complexity to the app ?

twist

Super Moderator

OK, so I can use Google Maps or Waze on my phone when nowhere near my car and so these navigation apps presumably use the phone’s GPS. That seems sensible as it means that the apps can be used for navigation in ANY car and not just ones which support CarPlay and Android Auto, as well as when cycling or walking.

So are you saying that if I then connect my phone to use my car’s display using CarPlay or Android Auto, those navigation apps will switch from using the phone’s GPS to using the car’s ? Why would they choose to do that and add another complexity to the app ?

Impala

Super Moderator

Hi @Green Coconut — a quick internet search reveals that many people using iPhone and CarPlay combination are experiencing the same/similar issues with the GPS position when using Apple Maps, Google or Waze. That suggests that this is not a fault with your car as the reports cover many different brands and models.

Where is your phone located when you have the problem ?

From what little I’ve gleaned from the internet, it seems that CarPlay can get the GPS data from the phone or the car and can switch between these if the GPS signal is weak or changes. In such circumstances, the phone may actually use the mobile network to get its location and as you can imagine the accuracy of that could vary quite a lot depending on your proximity to a phone mast. Also, if/when the car loses the GPS signal it can use inertial motion systems and the car’s speed to estimate the position for the onboard SatNav — I know my car does that when driving through tunnels.

I wonder if either of these is why sometimes the error you see can vary between 30m and 3km.

Unfortunately, I haven’t read of there being any fix for this issue or even if Apple have acknowledged the problem.

twist

Super Moderator

Odd that I’ve not experienced it at all if it is that widespread. First thing I do when I get in the car is plug in my iPhone, even when just nipping to the shops. Never noticed any GPS inaccuracies other than the direction I’m facing but it quickly sorts that out as I move off.

Wonder if it’s specific models of iPhone. Or where you store the phone. I put mine in the space under the climate controls for what it’s worth!

Green Coconut

Registered

Hi @Green Coconut — a quick internet search reveals that many people using iPhone and CarPlay combination are experiencing the same/similar issues with the GPS position when using Apple Maps, Google or Waze. That suggests that this is not a fault with your car as the reports cover many different brands and models.

Where is your phone located when you have the problem ?

From what little I’ve gleaned from the internet, it seems that CarPlay can get the GPS data from the phone or the car and can switch between these if the GPS signal is weak or changes. In such circumstances, the phone may actually use the mobile network to get its location and as you can imagine the accuracy of that could vary quite a lot depending on your proximity to a phone mast. Also, if/when the car loses the GPS signal it can use inertial motion systems and the car’s speed to estimate the position for the onboard SatNav — I know my car does that when driving through tunnels.

I wonder if either of these is why sometimes the error you see can vary between 30m and 3km.

Unfortunately, I haven’t read of there being any fix for this issue or even if Apple have acknowledged the problem.