Warning message after battery drained

[reevers]

My 2005 , C2 Tip was left for 2 weeks. The battery was understandably flat. Recharged battery and car started no problem. PCM error message was cleared , but Engine management warning light comes on and goes off over the course of a journey.

Car is driving fine with no noticeable faults, which may incur the warning light to go on.

Any ideas of what this could be?

 

[Nick_USA]

It sounds like your battery may still have issues.

If your battery is 4 years or older then it would be a likely suspect.

 

[Peter_997]

Not sure about the cause, but my advice would be to get it hooked up to an electronic diagnostics, see what that shows up and maybe give it a reset?

I had a similar issue recently, but it was my PASM light that was coming on for about a week, a clear did the trick (local independent Porsche garage was helpful to do this in a few mins) - light stopped coming on the morning after the clear.

Good luck

 

[beershark]

I had the same thing on my 997 when I had a flat battery. Had a few lights on but they cleared quickly.

Also, a friend has a Boxster and had the same thing as well.

No lights have re-appeared on mine since and runs fine.

I think its possibly a glitch in the system that accrue from a flat battery start.

Saying that, taking it to a dealer (or a friendly PCGB RO) where they can look at the system on their computer could put your mind at ease.