Question about 1999 Pontiac Grand Prix

1 Answer

Wy do car run but sometimes will not start? - 1999 Pontiac Grand Prix

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Pontiac Master
  • 2,185 Answers

Look for a light that says SECURITY when this happens. This can cause your car not to start.

The security light is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM. (Theft Deterrent Module) The TDM is what tells your computer that the correct key is being used and that it is "OK" to allow the vehicle to start and run. These 3 parts must be in CONSTANT communication. If the key is in the ignition, then these parts are sending important signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, (normally due to a failing/broken part) the car goes into antitheft mode. The car misinterperates this and thinks its being stolen or hotwired because it is NOT getting that signal from YOUR specific key. There is where the security light turns on and shuts down your vehicle. So basically, if that light is on, your system has some sort of failing part. This can start as an intermittent "no start", to your vehicle not running for days at a time, to the vehicle NEVER starting again. The problem is electrical and computer based, so don't count on an easy reset button, or the problem fixing itself. The hard part is isolating which part is the problem. You can spend a thousand dollars through a mechanic very easily. I have had great luck with bypassing the entire system. This way the problem will never return. It actually CAN'T ever return because it is eliminated. This can also be done yourself at a much cheaper cost. Read through this link very carefully. You'll find alot of information and pictures, along with ways to help you fix this.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Feb 11, 2012

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Vauxhall vectra problems wy whant my car rev past 4000rpm


the problem may be in the cam automatic adjustment device on the end of the cam shaft. Sometimes this can be recorded in the fault codes . They do wear out and do not advance /retard the cam timing as they are supposed to

Jul 25, 2014 | Vauxhall Vectra Cars & Trucks

1 Answer

Wy does my 02 ford explorer dies after ten minutes of being shut off?


O'REALLY?
first thing is the symptoms are not clear.
all cars are dead, after off for 10mins. all.
so>???
what you meant i thinks was, my cars stalls
is that it?
why not post what works right and not.
eg. my car works perfect then stalls.
eg: my car will not crank after driving for 4 hours, i stop and the starter is dead.
eg: my car always cranks but sometimes dont start hot or cold, or both.
eg: or?>

Jul 15, 2014 | 2002 Ford Explorer

1 Answer

Wy would my 2002 GMC Envoy have a noise in the transmission?


Depends on the noise. If there is a low hydraulic pressure in the transmission, it will not shift optimally. The reverse clutch pack may be worn. Sounds like time for an overhaul.

May 20, 2014 | 2002 GMC Envoy

1 Answer

Infinity 2000 i30 wine i start speeding up around 30 to 35 my car fills like it going out of control wy


is the noise going overtop of even your radio? how long has it been doing this? when you turn the steering wheel right or left does it go away?
from just your above issue it sounds like a wheel bearing is going on your vehicle but would need more information to be precise.

May 05, 2014 | 2001 Infiniti I30

1 Answer

Fiat palio 2, 1.7 td 2006 horn ( not working correcteli ?


You have not posted enough inforamtion about your heater so cannot advise about it BUT if your horn is only working sometimes you likely have a bad or loose connection or a bad ground that will need to be corrected.

Mar 29, 2014 | Fiat Palio Cars & Trucks

1 Answer

Wy wy shifter is too hard and sometimes breaks?


shift linkage/check codes if late shifting and rough tansmission pressure control solenoid valve/check ur fluid first /

Jan 23, 2013 | 1998 GMC Sierra

1 Answer

Wy do car run but sometimes hard 2 start?


Check out this both links shown below.Click the link and follow the troubleshooting to confirm,the problem.The car hard to start is basically the fuel pump issue:-----Car running hot? http://technoanswers.blogspot.in/2012/02/car-running-hot.html

---------
Car starting issues? http://technoanswers.blogspot.in/2012/02/car-starting-issues.html
-----This will help.Thanks.

Feb 11, 2012 | 1999 Pontiac Grand Prix

1 Answer

2003 4Runner: YELLOW LIGHT IS ON WY...


What Yellow light, Maint? VSC trac VSC OFF? Check Engine?

May 18, 2010 | 2003 Toyota 4Runner

Not finding what you are looking for?
1999 Pontiac Grand Prix Logo

111 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8215 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...