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Hi guys,

I drive an 05 Cobalt with about 160 000km on it. I'm up here in Canada where we're currently at -10. Anyway, the past week and the cold weather have brought some problems (I am assuming they are related?).

1. CEL comes on. I check the gas cap as the car is running fine. The light then goes off for 3 or 4 days, no problems.

2. 4 days later, I start the car in the cold weather. It's slow to start, but nothing uncommon. I let it warm for 7 or so minutes. I drive 5 minutes to my work. I come back out to start the car again and it doesn't turn (the dome light, radio, vent, etc. all work fine). The Security lock image appears. I turn the key back, wait 5 minutes and it starts fine.

3. Today, about 5 days since this last incident, my car is very slow to turn over (3 seconds after I turn the key before I hear anything). It starts, but the CEL is on and I have a 'REdUCED ENGINE POWER' warning. I turn the car off. I wait 5 minutes. It turns on again (with the same delay) but this time no reduced power, and it drives fine. The CEL remains.

I don't know if these are all related issues or separate, or how much the cold is affecting the car. I have had great advice on here before and hope to get some again before I get rinsed at the dealership. Any ideas?"?
 

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How old is your battery?
 

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One bad cell will bring voltage down to less than eleven volts. If all other cells are in top shape it will still start, it will still run. But a lot of the sensors have a regulated 11 volt and they don't like anything lower so funny stuff happens with a bad cell. Get your battery checked. Check the voltage to see where it's at at rest.(engine not running) It should be at least 12.3 Volts. Most batteries last about 5 years.
 
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