2017 Honda Civic Touring Nav Showing Wrong Location

Are you using apple carplay/android auto or the built in Garmin system?

 

Have you done an update?

 

Use your phone . Jk, well I like Google maps better, but that's besides the point. I've had that happen using android auto as well. I'd assume its just the GPS antenna wigging out, best bet is to have your dealer look at it. Also, if you hold the brightness adjuster, audio button, and menu button a little diagnostic menu will pop up and you can see how many satellites your antenna is seeing.

 

Unless it's a faulty part. I'd just take it in and tell them regardless. Don't mention anything about what you've seen on here, they usually just ignore what you have to say and make fun of you when you're gone.

 

I believe the GPS antenna is just under the top of the dash, so it is real close to the Instrument panel (speedometer). That unit has a Microprocessor, and associated high frequency radiation, and is in a Plastic enclosure.
Placing a metallic grounded screen over the top of (or ideally AROUND) the Instrument panel, between it and the GPS antenna, "May" improve things, or even moving the GPS antenna away from the Instrument panel, more towards the passenger side of the vehicle may help

Yes, one should not have to do this, but if this is the cause of the problem, there is not much of an alternative.

A Similar situation of INTERFERENCE exist between the AM Radio in the non Premium Audio systems, and the A/C-Heater Fan. (Not that many care or use AM these days)

The Premium systems have the AM/FM radio tuner located far away from the head unit (and the A/C Blower motor), so they do not suffer from this.

IF you run the Blower, and place a Portable AM radio near the dash, especially in the Passenger compartment foot-well (Close to the Blower Motor), you will hear the interference on the AM Radio.

 

If the navigation system has any option to set the "datum", try the WGS84 setting. There are several valid but slightly different ways to calculate latitude and longitude. For example, some datums consider continental drift and others do not. The WGS84 datum seems to be the default, and it might match the maps better than the others.