RaidersR1

Wonder if something happened at car wash?

Eric - Plug Guy

First - never use a car wash.

Second, check your optical connections, something is loose.

RaidersR1

I'm thinking when the frunk is opened water hit the CD changer in there.

Worked just fine when I left and drove for a bit. Stopped at store and 10 min later I get that.

Hope it's just connections. Uggg

RaidersR1

Got to next destination and turned off car and let it sit for a bit. Turned back on and it's all back to normal. (null)

Gremlins are starting to appear on my old stallion !! 😜

myw

it happens to a lot of us. once u turn the car off, back on it normally fixes itself.

mikes70

You have XM? accoridng to the dealer, XM ate my pcm. Replaced under warranty, if i didn't have that, i'd go after market. Always something.

newbwrx

Can you give more of an explanation on how XM ate your PCM? I sought out a car with XM.

D3RP

Classic computer. When in doubt, reboot.

mikes70

My PCM would go out interrmittantly from time to time at first (with heat). Then while the car was in the garage, not locked, it ran the battery dead. First thought was "old battery", got new one. PCM would go out and while car was in garage unlocked again, battery went dead again. Then while things were quiet, I heard a "servo motor" noise, I figured that was the problem, the PCM (possibly the CD motor) wouldn't shut off when the car was unlocked (in garage, days at a time.) so, started locking car in garage, problem #1 solved.

Took too dealer, car being CPO'd, warriented the PCM. The service writer told me that the head units from 2005ish to 2015 ish were manufactured by Panasonic and there is an impending suit/litigation (supposedly I haven't been able to verify) and that Panasonic vs XM software is/was the issue. Week and a half, they had my car, fixed it and he did say that he's had the problem be repetitive on the same car before.

Plus, I've seen other makes have the same issue (not with the battery dying, by radio/nav/sat, Also manufactured by Panasonic. Maybe this is old news, but I couldn't find this problem via search in this 997 forum.

RaidersR1

After disconnecting the battery for the night the gremlins are back and the PCM still says the same thing. Really sucks for this to happen.

Can't believe a connection came loose all of a sudden either. Replacing the PCM doesn't seem to the the answer either as it's working fine with everything else. Just no stereo.

I can only think that water got into something at the car wash.

squid42

Check your drains.

Is this a convertible?

RaidersR1

No.

Check drains for what?

BHMav8r

Shame on you for using a car wash. Your car is throwing a temper tantrum.

Check your drains for debris that might be blocking them.

Macster

While there are good reasons to not use a car wash damage to the car's electronics is not one of them. The interior of the car should remain dry when run through a car wash just like it should remain dry when you wash the car at home or the dealer valet service washes the car after servicing or you drive the car, park the car in the rain.

Check for signs of water where it shouldn't be. Most often the cabin floor gets wet from blocked body water drain. Less often from water leaking in through the door bottom the water in the door from a failed membrane.

Unless you are lucky and find a smoking gun that points to the reason for the errors I'm thinking you probably need this diagnosed by a tech with access to a Porsche diagnostic computer. With this he can query the PCM/navigationi system for any errors and from these know what's going on.

JW911

You can remove the PCM unit and send to Becker Audio for diagnosis and repair. Had this happen on a Cayenne once. Took a few weeks to get the unit back. Cost was something like $500 which was about $2500 cheaper than a new PCM. Porsche dealer won't repair it. They will only replace it. Do a google search for Becker audio.