Home Charging Fail...

[snstevens]

I was charging at an EA station two days ago when it unexpectedly stopped at 65%. I didn't bother trying to restart the charging process and decided to finish charging when I got home. So last night I go out to my 4s and plug in the charger and get the response "Already charged", but I was only at 43%.

I tried the charge ports on both sides of the car, then reset the EVSE (Porsche Wall Charger), but nothing fixed the problem. When I checked the charging settings it said "Porsche Charging Planner Active" and somewhat bizarrely "Charging target automatically set to 255%". Weird.

As a last gasp effort I did a two finger reset on the PCM, and when it was back up went to the Charging Settings page, and waited. Eventually the page changed to the standard settings page and I was able to complete home charging to 85%.

Has anyone seen this before and is there some other way other than a PCM reset to get out of the "Porsche Charging Planner Active" state?

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[Tooney]

When you charge at home and see the "porsche charging planner active", the charging planner is limiting your charge. Disconnect car from EVSE. Ensure that there is no active destination in the nav unit. If you check nav unit and do not see an active destination, enter a destination, let the nav unit generate a route, then teminate the route/destination. If that does not get rid of the charging planner active message, repeat the above, turn off operational readiness, exit the car and stay out of fob range for 10 minutes.

What is happening is that the charging planner has determined that additional charge is not needed according to its plan to reach the destination in nav unit.

 

[McgR]

When you charge at home and see the "porsche charging planner active", the charging planner is limiting your charge. Ensure that there is no active destination in the nav unit. If you check nav unit and do not see an active destination, enter a destination, let the nav unit generate a route, then teminate the route/destination. If that does not get rid of the charging planner active message, repeat the above, turn off operational readiness, exit the car and stay out of fob range for 10 minutes.

What is happening is that the charging planner has determined that additional charge is not needed according to its plan to reach the destination in nav unit.

I had the same when a just owned the car. Couldn’t figure out what I was doing wrong and couldn’t make it start to charge. No direct charge option. I solved it too with the PCM reset. Only found out later this was the problem. Kind of stupid setting.

 

[snstevens]

When you charge at home and see the "porsche charging planner active", the charging planner is limiting your charge. Disconnect car from EVSE. Ensure that there is no active destination in the nav unit. If you check nav unit and do not see an active destination, enter a destination, let the nav unit generate a route, then teminate the route/destination. If that does not get rid of the charging planner active message, repeat the above, turn off operational readiness, exit the car and stay out of fob range for 10 minutes.

What is happening is that the charging planner has determined that additional charge is not needed according to its plan to reach the destination in nav unit.

Excellent! I didn't try adding another destination and then terminating the route.

By "operational readiness" you mean turn the car off, exit, etc. right? I want to be sure I'm not missing a setting here or something.

I met up with @WasserGKuehlt today for coffee and he mentioned that the 255% charging target in the picture above represents an overflow of an 8-bit register/field somewhere in the software, and that this is either a source of the error or a related side-effect.

 

[Tooney]

Yes, "operational readiness" is Porsche's term for ignition on. I was told early on that the Taycan is never truly "off".

 

[WasserGKuehlt]

I met up with @WasserGKuehlt today for coffee and he mentioned that the 255% charging target in the picture above represents an overflow of an 8-bit register/field somewhere in the software, and that this is either a source of the error or a related side-effect.

I was merely quoting this post ?https://www.taycanforum.com/forum/t...as-automatically-set-to-255.15234/post-232264

(Great meeting you! Hopefully we can expand the circle of PNW owners who have put faces to aliases.. ?)

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