# 07 Pontiac G5 won't start after temperature gets below 40 degrees **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [October 14, 2018, 1:40pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733 "2018-10-14T13:40:53Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Tray\_Messer\_Jr](https://avatars.discourse-cdn.com/v4/letter/t/7c8e57/32.png) [@Tray\_Messer\_Jr](https://community.cartalk.com/u/Tray_Messer_Jr)\ **Post date:** [October 14, 2018, 1:40pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/1 "2018-10-14T13:40:53Z")
I had issues last winner that whwn the temperature gets below 40 degrees the car would not start, put a battery pack on it for half an hour would start up right away. I’ve already replaced the battery with a new one. I was thinking it was the alternator but why would it be the alternator cuz it wasn’t doing it at all this spring and summer it started doing it soon as it got cold again ---
**Author:** ![COROLLAGUY1](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/corollaguy1/32/7575_2.png) [@COROLLAGUY1](https://community.cartalk.com/u/COROLLAGUY1)\ **Post date:** [October 14, 2018, 1:44pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/2 "2018-10-14T13:44:46Z")
Did you check all connections to the battery? are they clean and tight? ---
**Author:** ![Tray\_Messer\_Jr](https://avatars.discourse-cdn.com/v4/letter/t/7c8e57/32.png) [@Tray\_Messer\_Jr](https://community.cartalk.com/u/Tray_Messer_Jr)\ **Post date:** [October 14, 2018, 1:46pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/3 "2018-10-14T13:46:47Z")
Yep. If they werent clean wouldnt I had issues during the spring and summer time as well? ---
**Author:** ![COROLLAGUY1](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/corollaguy1/32/7575_2.png) [@COROLLAGUY1](https://community.cartalk.com/u/COROLLAGUY1)\ **Post date:** [October 14, 2018, 1:50pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/4 "2018-10-14T13:50:48Z")
Then something is draining your battery. First thing to check is the dome light.Make sure its off after you exit the car. ---
**Author:** ![Tray\_Messer\_Jr](https://avatars.discourse-cdn.com/v4/letter/t/7c8e57/32.png) [@Tray\_Messer\_Jr](https://community.cartalk.com/u/Tray_Messer_Jr)\ **Post date:** [October 14, 2018, 1:53pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/5 "2018-10-14T13:53:25Z")
We already went through all that last winter. I even disconnected the battery overnight hooked it back up and still the same thing ---
**Author:** ![COROLLAGUY1](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/corollaguy1/32/7575_2.png) [@COROLLAGUY1](https://community.cartalk.com/u/COROLLAGUY1)\ **Post date:** [October 14, 2018, 1:58pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/6 "2018-10-14T13:58:25Z")
What is the voltage of your battery and cold crank amperage? ---
**Author:** ![Tray\_Messer\_Jr](https://avatars.discourse-cdn.com/v4/letter/t/7c8e57/32.png) [@Tray\_Messer\_Jr](https://community.cartalk.com/u/Tray_Messer_Jr)\ **Post date:** [October 14, 2018, 2:16pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/7 "2018-10-14T14:16:33Z")
It’s only sitting at 7.5 😑 ---
**Author:** ![Tray\_Messer\_Jr](https://avatars.discourse-cdn.com/v4/letter/t/7c8e57/32.png) [@Tray\_Messer\_Jr](https://community.cartalk.com/u/Tray_Messer_Jr)\ **Post date:** [October 14, 2018, 2:17pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/8 "2018-10-14T14:17:35Z")
And cca is 615 ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [October 14, 2018, 2:25pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/9 "2018-10-14T14:25:18Z")
So basically, dead… ---
**Author:** ![Tray\_Messer\_Jr](https://avatars.discourse-cdn.com/v4/letter/t/7c8e57/32.png) [@Tray\_Messer\_Jr](https://community.cartalk.com/u/Tray_Messer_Jr)\ **Post date:** [October 14, 2018, 2:35pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/10 "2018-10-14T14:35:51Z")
Yep. 😒 I just don’t know what would be draining it. ---
**Author:** ![Tray\_Messer\_Jr](https://avatars.discourse-cdn.com/v4/letter/t/7c8e57/32.png) [@Tray\_Messer\_Jr](https://community.cartalk.com/u/Tray_Messer_Jr)\ **Post date:** [October 14, 2018, 2:38pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/11 "2018-10-14T14:38:11Z")
Haven’t had any issues with it until today too. ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [October 14, 2018, 3:11pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/12 "2018-10-14T15:11:27Z")
You need to run a parasitic drain test. Check out a video on how to do that from Eric The Car Guy on YouTube. Suspect aftermarket car alarms and aftermarket stereo systems, especially amps. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [October 14, 2018, 11:41pm UTC](https://community.cartalk.com/t/07-pontiac-g5-wont-start-after-temperature-gets-below-40-degrees/126733/13 "2018-10-14T23:41:49Z")
Good advice above. A basic voltage test at the battery terminals is worthwhile too. Before first crank of the day the battery should measure about 12.6 volts. Immediately after starting the engine it should measure 13.5-15.5 volts. If you are getting different numbers than that , post them.