Need Help?

2005 Pontiac Grand Prix Base 4dr Sedan

2005 Pontiac Grand Prix
Trim Info:
Front Wheel Drive, 4 Door Sedan, Mid-Size
20 mpg city / 30 mpg hwy
Other Trims
Do you own this car?
Estimated Mileage
 Miles
Enter current mileage for most
accurate info about this vehicle


Track Your Service Records
Get Recall Alerts
Get Updated Value Estimates on Your Car.
back to question list

Ask the Community

Ask Our Auto Mechanics


May 5, 2013, 10:00 am

Mike K
 

Question: Whats wrong with my car?

I have a 2004 grand prix with 126k miles on it and recently the charging system failure has come on the DIC along with check engine soon. I took it to both autozones, penzoil, and walmart plus a co worker of mine had done the test where you plug into the dash and no codes have been sent back. My co worker said that its giving diffrent voltage throughout everything and he dont know why. I have had the battery and alternator checked and both are good. Dont know what to do now please help?


May 10, 2013, 8:50 pm

Ron W
Expert Mechanic

Did you check the alternator for AC leakage? It may be a diode in it has failed and you are getting AC voltage leaking into the DC system. This can cause all kinds of odd problems.

If the Check Engine light is/was on, there is a code stored in history, and you may need a better scantool to access it. Sometimes the generic scantools miss stuff.


0/0 users found this helpful.

Ask our panel of certified auto mechanics a question. We pay for their advice so you don't have to



My Auto Score

See the free AutoCheck score

For Your 2005 Pontiac Grand Prix
Meet The Experts
Kim Perrin
Kim Perrin is our resident mechanic here at DriverSide. Kim worked as…
Tyler Orr
Tyler Orr is an expert in German and Japanese cars and has been a mechanic …
Elizabeth Kriesten
Elizabeth Kriesten worked as an automotive technician for several years at Dodge…
Tips on Servicing

Car Brakes: How Do You Know When to Change Them?

By Zach Bowman For those who suffer a daily commute through heavy traffic, your vehicle's braking system can bring thousands of pounds of metal, plastic and empty Starbucks cups to a stop hundreds of times before you get to work. It goes without saying that these pieces wear out, but they do so slowly, meaning you may not notice they need attention until ...

Read more…