2006 Grand Prix GT loses all electrical and the engine randomly shuts off

30

Asked by Oct 31, 2013 at 11:53 PM about the Pontiac Grand Prix

Question type: Maintenance & Repair

I have a 2006 Pontiac Grand Prix GT with 85,000 miles, 3.8 TC. For the last two months the car sometimes loses all electrical and the engine shuts off as if you removed the battery. The main ground to the motor has good continuity. This has happened at idle, low and high speeds. Recently the car had no power and I had to unlock it manually. It will start right back up, and I will not have a problem for a day or a week. The battery is good in the car and not codes are showing. The only constant that has been seen by me or my wife is that when it is having an "episode" the cruise control will not work.

7 Answers

6,360

sounds to me like your emc is going to hell. Plus check the body grounds and the positive cable connection

1 people found this helpful.
6,360

Try this first take the nagative cable off and make sure all connections are clean and conectected good that includes your positife conetions all so. also is the bat light or gauge showing any thing?

1 people found this helpful.
30

Where are all the body grounds located at? Maybe I missed one. Also, I have already removed and cleaned the positive battery terminal.

1 people found this helpful.
6,360

ussaly on the fire wall or the iner fender well or the frame

124,085

I agree with checking and cleaning all battery connections. Make sure they are all tight. Also make sure that the negative connections on the frame and motor are also clean and tight. Inspect all cable ends for signs of fraying.

30

Here is the follow up to the car since I THINK it is fixed. I checked over the main grounds again with a multi-meter and gave them a good pull. The lug that is attached to the chassis ground under the battery was a little corroded. I unbolted the ground and the car lost all power. I then cleaned the lug real well and sanded all the paint off on the fender wall where the lug attaches. After rebolting the ground I used some touch up paint for the bare metal. Yes, the lug was bolted on top of a painted surface. So far, so good. Thanks again for the advice.

2 people found this helpful.
60

sweet im gonna try that to then..my 2006 is doing same thing frustrating

Your Answer:

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 1,696 nationwide Grand Prix listings starting at $1,500.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,740
  • #2
    Tom Demyan
    Reputation
    3,320
  • #3
    munron
    Reputation
    2,900
View All

Related Models For Sale

Used Chevrolet Impala
527 Great Deals out of 26,257 listings starting at $995
Used Pontiac G8
6 Great Deals out of 348 listings starting at $4,995
Used Dodge Charger
347 Great Deals out of 29,951 listings starting at $2,000
Used Chevrolet Monte Carlo
4 Great Deals out of 976 listings starting at $1,125
Used Pontiac Bonneville
4 Great Deals out of 333 listings starting at $2,900
Used Pontiac Grand Am
735 listings starting at $2,490
Used Pontiac G6
48 Great Deals out of 2,710 listings starting at $750
Used Chevrolet Malibu
594 Great Deals out of 51,820 listings starting at $1,550
Used Pontiac GTO
4 Great Deals out of 401 listings starting at $7,000
Used Chevrolet Camaro
260 Great Deals out of 27,405 listings starting at $2,900
Used Ford Mustang
297 Great Deals out of 40,393 listings starting at $1,312
Used Pontiac Firebird
5 Great Deals out of 695 listings starting at $3,995
Used Dodge Challenger
185 Great Deals out of 22,223 listings starting at $7,495
Used Nissan Altima
848 Great Deals out of 62,411 listings starting at $1,000
Used Honda Accord
713 Great Deals out of 103,659 listings starting at $999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.