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I have a 2009 Pontiac G5 took it to the dealership 4 times now and they haven't been able to solve problem. when driving the engine light goes on then it tells me its reducing speed of car then car dies on me. Dealership put in new computer and still not working well.
Have you heard of others having problems.
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it does not use antifreeze. you will need to buy Dexccol premixed 50/50 coolant. There is no universal coolant, use Dexcool only, it is red. you should never ever add water, only premixed coolant.
the premixed is good to -40 degrees F.
It sounds like your car battery is dead. If you connect another car as if you were going to jump-start your car - you ought to be able to remove the key - or crank the engine to start it.
You didn't include the year of your G5, so I don't know about recalls for it - as there seems to be one for the 2009 - linked below:
This is a fairly common problem on GM vehicles and is usually caused by a bad wheel speed sensor or dirt on the sensor. If your mechanic can't fix it, time to find a more competent mechanic. It's not rocket science
I have the same issue, just started today. My radio went out, tire light came on... now my keyless entry doesn't work, and it says all 4 tire sensors are not responding. I tried replacing fuse #23 (15A) [audio] fuse inside the car on the pass side, and it immediately pops when I put a new one in.... 2009 g5 with 39k miles. great...
po641 on a 09 g5 2.2 means that there is a problem with the 5 volt coming from the ecm the same 5 volts is sent to about 6 sensors you need to look at the 5 volt referance pid on a scan tool and disconect the sensors one by one till the referance volts comes to about 5 volts if that don't work then check the wires for a short to ground , usually ther are other codes in the memory to give you a hint
You must get the error code read for the check engine light in order to get helped here. Bring your vehicle to a local autozone to have your vehicles computer scanned, its free or local shop (most charge for this). Post the codes on fixya for further assistance.
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