Service engine soon light

1999 PONTIAC GRAND AM
196,000 MILES • 4 CYL • FWD • AUTOMATIC
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GRRCARS
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The service engine soon light came on and the RPM needle sits just below one when idling. The car doesn't hesitate or sound rough when running. It's running normally from what I can tell.
Jun 26, 2008 at 7:45 PM
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BLACKOP555
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scan for codes, could be something like the gas cap was on lightly and needs to be reset. This guide will show you how

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back.
Jun 26, 2008 at 10:48 PM
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AVALENZUS
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all repairs done recently:
new radiator, thermostat, timing change, waterpump, and abs repaired.

The car continually heats of to the line just past 200. The termostat states should be 198 degrees and there is always a slight smell of hot antifreeze but no visable leaks, also Service Engine Light comes on and diagnostic code states P0507 idle high. Whats up? What is wrong and how can I repair it?
Jul 6, 2020 at 7:04 PM (Merged)
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HMAC300
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the thermostat change is no big deal. If the thermostat is 198 degrees a little over 200 is nothing to worry about.It's actually about right due to the positioning of the temperature sensor. If your idle is to high you might try cleaning your throttle plate with choke cleaner on both sides and also the idle air control hole, which is kind of an oblong hole near the throttle plate. Put the air duct back on and it may be hard to start and then see if it idles high then. YOu will need a scan tool to put your service engine light out.
Jul 6, 2020 at 7:04 PM (Merged)
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NIKKISHAY
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Hello. My service engine light has been on for a long time. I need to get my car inspected. I had a couple of diagnosis that state that I have a small leak so I changed the gas cap. Light stayed off for two days, then came back on. A mechanic has offered to reset the light right before my inspection. My question is will this allow the car to pass, or do I need to drive the car for a while before inspection? Thanks.
Jul 6, 2020 at 7:04 PM (Merged)
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RASMATAZ
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Why don't you have it smoke tested to locate the leak
Jul 6, 2020 at 7:04 PM (Merged)
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SATURNTECH9
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To answer your question if you reset the light and learn the odb2 monitors and have the test done before the light comes back on and sets the code then yes its possible.
Jul 6, 2020 at 7:04 PM (Merged)
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RASMATAZ
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Just hope and pray it doesn't come on during the inspection if you decide that way -Good Luck
Jul 6, 2020 at 7:04 PM (Merged)
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SATURNTECH9
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Worse case senerio light comes on fails and pays for another smog and has to fix the problem.Also you said you replaced the gas cap i have found that some aftermarket gas caps dont seal well.Especially the locking ones.
Jul 6, 2020 at 7:04 PM (Merged)
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DYLANV
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I have been an avid DIY and wanted to know if it is best to buy a simple all-in-one scanner for the OBD2 system or purchase the software and go the route of using a laptop to research and turn off codes.
Jul 6, 2020 at 7:04 PM (Merged)
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JDL
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This is just my opinion. I'd get a handheld scanner that not only checks codes but also shows live engine data and will work on as many different makes and models, years as possible.

Manufacturer scanners are the best, but, that can get expensive. There is nothing wrong with using laptop and software. I don't happen to own a laptop at the moment.
Jul 6, 2020 at 7:04 PM (Merged)
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CHUDY
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When I start my vehicle none of the accesory lights or gauges come on along with the blower for the heater. The vehicle runs and operates normally. Then after awhile of driving the everything kicks on as it is suppose to when you would normally start the vehicle. The service engine soon light has not come on in responce to this problem.
Jul 6, 2020 at 7:04 PM (Merged)
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DOCFIXIT
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May have a problem with the Body Control Module
Jul 6, 2020 at 7:04 PM (Merged)
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CHUDY
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Would you happen to know how difficult of a job it would be to change the BCM in my 99 Grand Am
Jul 6, 2020 at 7:04 PM (Merged)
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DOCFIXIT
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To be sure that is the fault a scanner is needed to check BCM. It is located right side dash up high to right of blower motor. They are @$340 so need to verify first.
Jul 6, 2020 at 7:04 PM (Merged)
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CHUDY
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If I would go to a junk yard and purchase a BCM for my grand am will it effect the digital odometer for my car since it will be a different BCM. I've heard it would need to be programed to my car, but I wasn't sure if I needed to do that since I don't have keyless entry or power windows etc.
- Thanks
Jul 6, 2020 at 7:04 PM (Merged)
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BRETT6591
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i am getting a check engine code for my pontiac grand am se 2.4 motor the code is p0171 systen to lean bank 1 so i was told this is making my car dump alot of fule to try to fix itself but now i have changed my ox sensor bank 1 2 times and no change and the cars cat is gettting really hot now the messed up part is that the car only dose this from time to time my check engine light will just go off on its own and the car will run fine no problems and then is will come back on and the car will be running like crap again and just this past winter i had gone like 2 mounth without a problem so when the car is cold i dont seem to be as bad in the winter any help would be great
Jul 6, 2020 at 7:04 PM (Merged)
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DOCFIXIT
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You need a scan tool with latest software to program BCM.
Jul 6, 2020 at 7:04 PM (Merged)
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SATURNTECH9
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So no one said the first thing you should check for is a vacuum leak with that code?Thats the first thing i would look for is a vacuum that would set a lean code for sure.
Jul 6, 2020 at 7:04 PM (Merged)
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CHUDY
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I was wondering if I replace the BCM will it effect my vehicle mileage since I have digital odometer.
Jul 6, 2020 at 7:04 PM (Merged)
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BRETT6591
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yes i have tryed when the car is running it is at a low idle and i had tryed spraying starting flu to see if i could get my idle to raise i had sprayed the wiring harness and other lines to see if it would work
Jul 6, 2020 at 7:04 PM (Merged)
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DOCFIXIT
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No your O.K. there
Jul 6, 2020 at 7:04 PM (Merged)
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SATURNTECH9
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Never use starting fluid its highly flamable and you could catch yourself on fire.Use carb spray and spraying around the wires isnt going to tell you anything.Spray around all the vacuum lines intake gasket etc if the idle goes up down or stumbles or dies you found a leak.The best way to look for a leak that will even find the small leak is to use a scan tool that shows engine live data.Watch the fuel trims while your spraying if they spike you found a leak.Also a smoke test could find a leak.
Jul 6, 2020 at 7:04 PM (Merged)
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BRETT6591
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nope no leak and i am now getting a code for my bank 1 sensor 1 no activity ?
Jul 6, 2020 at 7:04 PM (Merged)
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SATURNTECH9
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Alright have you checked the actual fuel pressure?Also are you talking about the new code is a o2 sensor code?If so what is the exact code number you have?That would be the o2 sensor in the exhaust manifold.Inspect the harness going to the o2 sensor.Also i have cars with the P0171 codes that took a smoke test to find the vacuum leak they replaced everything and finally found the vacuum leak with a smoke test.Just a thought.
Jul 6, 2020 at 7:04 PM (Merged)
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GOTALOVEMYGRANDAM
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I have this wonderful car.(sometimes) well, the check engine soon light went on? Code was for cylinder 1. Changed spark plugs. Now car is making funny noise ... . and yes the car overheats. Too. Finding out that's normal. But I drove it on a trip it ran fine didn't even overheat. Come back home to Redding, ca. where its hot and it starts to act up. Go figure. well what do you think is going on with my car. I have changed water pump, thermostat, coolant resivor and cap.. which helped for a while. NOW what? :(
Jul 6, 2020 at 7:04 PM (Merged)
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SERVICE WRITER
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Overheating is not normal.
Are you losing any coolant?

Define funny noise.
Jul 6, 2020 at 7:04 PM (Merged)
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BRETT6591
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yes i have checked the fuel pressure it is fine ive never tryed a smoke test is this something i can do myself or must i take it to a shop i dont have my scaner anymore so ill have to take it back to autozone to get my code again ill post when i do
Jul 6, 2020 at 7:04 PM (Merged)
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GOTALOVEMYGRANDAM
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yes it does overheat . have to add water or coolant requalarly. not to worried about that part. the funny noise. sound like it is coming from the alternator. its a taping sound but its not my valves. we just changed the spark plugs . but now the service engine light is blinking. so i am not driving it. due to reading owners manual say that could cause more problems. But after changing the plugs car now runs slugish.
Jul 6, 2020 at 7:04 PM (Merged)
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SATURNTECH9
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Some people make there own smoke machines you can see them on you tube.The evap ones they sell that are made for that and for finding evap codes start about 700.You can always make your own smoke machine iam working on making one myself.You can also watch people doing smoke tests on you tube so you can get a idea of what iam talking about.Let me know what codes you have when you get it scanned.
Jul 6, 2020 at 7:04 PM (Merged)
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SERVICE WRITER
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I would be very concerned about the over heating.
Year and engine size would be nice.
The flashing means damage is being done to the coverter.

Was it running fine before the plugs were changed?

What did the plugs look like?

Not sure on the noise, the 3.1s sometimes have a tap to them.
Jul 6, 2020 at 7:04 PM (Merged)
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SKITZO63
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Electrical problem
1999 Pontiac Grand Am 6 cyl Front Wheel Drive Automatic

I just bought a 1999 Grand am Gt, and it has a few items on my laundry list of the car. Any help is much apreciated. 1. My blinker when I turn the right turn light on it blinks really fast ( blown bulb...) But I check and all the bulbs are going there dim..but going and its not in the same pattern as the left. also after I turn it off I will still hear the clicking although its not in a set order it can be 3 fast clicks, a pause 1 click, a pause 2 clicks..etc. 2. My abs and trac control lights are on. 3. My right break when ever I use it, it sounds like someone walking across a old wood floor. 4. Services vehicle soon, and service engine soon lights are booth on, I took it to autozone they said my gas cap. But why would that cause both of them to be on? and I don't know if im crazy or not but it seems like the service vehicle soon light only comes on in the day time and at night it does not. Please email me - [email protected] thank you so much, Eric.
Jul 6, 2020 at 7:04 PM (Merged)
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GOTALOVEMYGRANDAM
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it is a 99 grand am . with a 3400sfi engine. yes it does overheat sometimes but i always make sure it has coolant in it . like i said it didnt overheat once on the road trip. before the service engine light when on it was running but it wasnt as slugish as it is now. it was not making a taping noise at all . it had a squeal that i believe was coming from the power stering pump. the code for the service engine light said cyclinder 1 misfiring.
Jul 6, 2020 at 7:04 PM (Merged)
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MMPRINCE4000
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1. Check the flasher unit if bulbs are OK.

2. You will have to get the ABS and trac. control system scanned with a chassis scanner, looking for "C" codes.

3. Remove the rear brake caliper and inspect pads and rotor for abnormal wear.

4. Gas cap would set the service engine soon light as an EVAP code. Service vehicle soon is simply a reminder to change oil, air filter etc.
Jul 6, 2020 at 7:04 PM (Merged)
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GOTALOVEMYGRANDAM
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the plugs looked fine. wernt oil ie or no ash . just looked like normal plugs needing to be changed.
Jul 6, 2020 at 7:04 PM (Merged)
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SERVICE WRITER
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3400 motor?? You should be very concerned about the overheating, these are verycommon for intake manifold gasket leaks. I have seen them kill a motor when ignored.
Jul 6, 2020 at 7:04 PM (Merged)
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PONTIAC PROBLEMS
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Have 1999 Pontiac Grand Am was driving kids to school and all at once car started running rough would harldy idle , check engine light came on , borrowed friends code reader , it came up with code 200 injector lline breakage, could you help with possible ansewer?
Jul 6, 2020 at 7:04 PM (Merged)
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SATURNTECH9
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https://www.2carpros.com/forum/automotive_pictures/416332_1999_pontiac_grand_am_code_p0200_part1_1.jpg


https://www.2carpros.com/forum/automotive_pictures/416332_1999_pontiac_grand_am_code_p0200_part2_1.jpg


https://www.2carpros.com/forum/automotive_pictures/416332_1999_pontiac_grand_am_code_p0200_part3_1.jpg

There is the trouble tree for the code p0200 give that a try and see what you can find.
Jul 6, 2020 at 7:04 PM (Merged)
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MIKE AND IKE
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Engine Mechanical problem
1999 Pontiac Grand Am 4 cyl Front Wheel Drive 145000 miles

hesitant to accelerate, turnin ac on will cause to stall
service engine soon light on, is it cylinder misfires related to coil wires? how expensive of a repair is this?
Jul 6, 2020 at 7:04 PM (Merged)
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RASMATAZ
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Check engine light:

Have the computer scanned for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis,finding out what's going on.
Jul 6, 2020 at 7:04 PM (Merged)
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FWILLIAMS
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while driving the car yesterday, it lost about half it's
power, check engine light came on, also low trac lght. engine idles rough, with raw fuel smell coming from the exhaust. my question, under the engine cover is a odd looking coil pack? maybe? can this be tested, also can the ignition modual be tested?
Jul 6, 2020 at 7:04 PM (Merged)