The clock in my 997.1 loses about a minute a day. Being **** about this sort of thing, I'm wondering if there is some sort of adjustment available.

 

Mine does the same thing. The dealer replaced the whole head unit, under warrantee, but it made no difference. It continues to do this. I just adjust it each week or so. Would love to find a more elegant solution.
CATTMAN

 

Same thing happened to my 05 C2S. Dealer replaced PCM under warranty. It's a common problem on early 997.

 

Same here. Unfortunately there is no remedy

 

I've had my head unit replaced as well under warranty, still does it. Kinda dumb if you ask me, you buy a $100K+ car and the clock can't hold time. Is this something that has been remedied on the 997.2's?

 

Probably runs on a MS DOS/Windows. They all do it as well.

 

Here's a really dumb answer. My 06 does the same thing, but this past Summer I left it in Florida for 4 months on a battery maintainer and it did not lose a second.

 

You know, given the issues with batteries in these cars not staying fully charged unless you drive the car regularly it wouldn't be all that surprising if the issue were one of voltage to the PCM unit being a tad too low. I wounder if the common denominator here is cars that aren't driven every day. Given that a clock is not very high tech I can't imagine it being a function of the clock itself. Could also be a function of the way the clock is wired into the PCM being a cause of a current drain, IE.... the PCM, or better put the alarm system, using more than it's share of juice while the car is parked.

 

you guys are driving too fast, your clocks couldn't keep up with your speed, my advise is to slow down...

 

Mine does the same. It's an '06 and I drive it frequently - I think! 28k miles in 3 1/2 years - don't know it this mileage qualifies as frequently, though.

 

Are the clocks in cars with PCM updated via the GPS? I've noticed this happening after a battery disconnect where it defaults to the 12:00, and then will auto update after some time - my guess that it was always pulling this data from the GPS as my hand helds do.

 

Same here on my 06 - whole unit replaced under warranty but still loses time.