Starting/Electrical Problems - Pontiac G6 Forum
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post #1 of 21 (permalink) Old 08-10-2011, 03:48 AM Thread Starter
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Starting/Electrical Problems

I have a 2009 Pontiac G6 GT, has about 63,000 miles on it. A little over a week ago I get in the car and it would not start, all that came up was an error message. Eventually after disconnecting and reconnecting the battery, it started and it made it's way back home. After that it still would not start consistently, most of the time you would hear a click, or get the error message, however, if you shut the door hard or popped the hood then closed it, the rattle seemed to loosen something and the car could start. Wires have been checked, the battery has been replaced, brand new. The starter motor has been replaced. It worked for a good 20 starts afterwards. Now when attempted to start the car, just the error message again, no click, disconnecting then reconnecting the battery doesn't get it started anymore. It's been a frustrating 10 days or so and now it seems like a computer related problem. Any opinions?
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post #2 of 21 (permalink) Old 08-10-2011, 04:29 AM
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WOW!
Have you tried to leave the bat disconnected for an hour?
Have you modified any thing else eletrical lately?




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post #3 of 21 (permalink) Old 08-10-2011, 04:56 AM Thread Starter
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Definitely left it disconnected for at least 5 minutes maybe longer when i replaced the battery but not an hour. I have not done anything electrical to the car, it is bone stock. On a side note, I doubt it has to do with anything, the day it started failing was when I went to get new tires. But I started the car at least 5 times after that with no problems.
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post #4 of 21 (permalink) Old 08-10-2011, 12:29 PM
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Quote:
Originally Posted by jokemaker23 View Post
I have a 2009 Pontiac G6 GT, has about 63,000 miles on it. A little over a week ago I get in the car and it would not start, all that came up was an error message. Eventually after disconnecting and reconnecting the battery, it started and it made it's way back home. After that it still would not start consistently, most of the time you would hear a click, or get the error message, however, if you shut the door hard or popped the hood then closed it, the rattle seemed to loosen something and the car could start. Wires have been checked, the battery has been replaced, brand new. The starter motor has been replaced. It worked for a good 20 starts afterwards. Now when attempted to start the car, just the error message again, no click, disconnecting then reconnecting the battery doesn't get it started anymore. It's been a frustrating 10 days or so and now it seems like a computer related problem. Any opinions?
What is the exact text of the error message?



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post #5 of 21 (permalink) Old 08-10-2011, 01:34 PM Thread Starter
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In the dash where the odometer is displayed it just says "error" and it will also say service traction, or service airbag, mostly the traction one.
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post #6 of 21 (permalink) Old 08-10-2011, 01:54 PM
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In the dash where the odometer is displayed it just says "error" and it will also say service traction, or service airbag, mostly the traction one.
Have someone watch the headlights while you try to crank the engine. Do they dim or go out? Was the charging system warning light ever coming on when you last had it running?




Last edited by greenman; 08-10-2011 at 02:30 PM.
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post #7 of 21 (permalink) Old 08-10-2011, 02:42 PM Thread Starter
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The battery check has already been done, the lights dont dim but in some cases they will just go off completely but not dim. When you turn the key, before you start it the fuel pump should come on otherwise it's not gonna start so before I even see the error message each time, I know it's coming up if I don't hear the fuel pump.
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post #8 of 21 (permalink) Old 08-10-2011, 03:27 PM
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Quote:
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The battery check has already been done, the lights dont dim but in some cases they will just go off completely but not dim. When you turn the key, before you start it the fuel pump should come on otherwise it's not gonna start so before I even see the error message each time, I know it's coming up if I don't hear the fuel pump.
Did you clean the batt terminals with a wire brush when you changed the batt? Did you put anything on the batt posts before putting the terminals back on? You verified the batt ground to the body is clean & tight?



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post #9 of 21 (permalink) Old 08-10-2011, 03:40 PM Thread Starter
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Posts are clean, everything is nice and tight there can't be a cleaner connection than what it has now. And it's a brand new battery. 1 week old.
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post #10 of 21 (permalink) Old 08-10-2011, 06:13 PM
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Here's an quick & easy thing to try. In the engine compartment fuse box identify & mark relays 31, 32 & 53. Then swap 31 & 32 each in turn with relay 53. You can leave the 53 slot empty for the tests. Try to start the engine after each swap.




Last edited by greenman; 08-10-2011 at 07:03 PM.
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post #11 of 21 (permalink) Old 08-11-2011, 01:12 AM Thread Starter
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I'll try that tomorrow, what should I expect to happen, if anything?
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post #12 of 21 (permalink) Old 08-11-2011, 11:47 AM
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Do you know how relays work? Are you skilled with a multimeter?




Last edited by greenman; 08-12-2011 at 02:35 AM.
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post #13 of 21 (permalink) Old 08-11-2011, 12:01 PM
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someone else has had this error on the odometer display...i'll try to find the thread

2006 Pontiac G6 V6 3500L
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post #14 of 21 (permalink) Old 08-11-2011, 12:08 PM
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https://www.g6ownersclub.com/forum/sh...odometer+error

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post #15 of 21 (permalink) Old 08-11-2011, 12:51 PM
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from the 09 SI:
The odometer information is stored in the body control module (BCM) and is transmitted to the instrument panel cluster (IPC) for display in the driver information center (DIC). The IPC stores a backup copy of the odometer value in case it does not receive a valid odometer reading form the BCM. The last known good odometer value from the BCM is displayed by the IPC. ERROR is displayed in the DIC when the IPC receives an invalid odometer value.
__________________________________________________ _________________

My thinking is a low system voltage issue but it could be the fretting corrosion of the BCM connector issue or who the heck knows what. Maybe it will turn out to be a bad engine fuse block. Very tough for anyone to diagnose an issue like this but it's near impossible without the use of a multimeter & the SI at the very least. The dealer, with his tech 2, has most of the playing cards. Which, of course, is by design.




Last edited by greenman; 08-12-2011 at 12:20 AM.
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