I bought an 09 G6 last year. It had been in an accident (which may or may not have anything to do with the issues I am having with it). The car drove perfect for about a month - no issues. Then...
- While sitting at a stop light, all the gauges on my dash went off. The low fuel light comes on (probably because the gas gauge is at 0), No Traction Control light, Check Engine Light, etc. In other times that this has happened, I was able to notice that speed-sensitive sounds goes off, as does the A/C. The radio and 'blower' are still on, but just 'basic'. The car is still running and is driveable (if you can guess your speed), but it shifts very rough.
Sometimes, everything comes back up on it's own. Sometimes I have to hit a big bump (and I mean a BIG BUMP) and everything will work. Sometimes I just go home and shut it off. If I shut it off with the gauges not working, the car will not restart...unless I set off the car alarm - which will work as a fix 98% off the time.
The first time it happened and the gauges came back up, we had the codes read at AutoZone. I don't recall what they were (something to do with communication bus?), but if I get this issue again soon, I will post what they are. Took it to the dealer the second time it happened and after hours of diagnostics, they had me replace a connector that plugs in to the front of the computer - they said it was damaged (likely from the crash). My father-in-law (a retired mechanic) replaced it and I had no issues for about a month.
I just found this thread on the forum,
so I will have my husband check to see if that helps, but any other ideas would be appreciated.
- Sometimes when I go to start my car, it won't start. Not even trying to crank at all. The relays are clicking over (according to my husband), but nothing. Completely by accident, we discovered that if you honk the horn while trying to start the car (begin honking, turn key, stop honking) the car will start and run like a champ. Although this 'fixes' our problem, it is a bit annoying to have to your car not start and then lay on the horn to get it to work.
I used to only have one of these problems about once a month, so I just kind of dealt with it. Lately I have had a problem with it about 50% of the time I go to drive it.
Any insight on where to start to get a permanent fix (or at least one better than honking the horn or setting off the car alarm) to either of these problems would be greatly appreciated.