2000 pontiac grand prix 3.8. Service engine soon light came on. Oreilly scan tool said its running too cold. The gauge barely comes up at all bu the heat seems to work fine. I changed the thermostat in case it was sticking open, but light remains on. I tried the key on accelerator thing , no change. headlights are both working. any ideas? Oh and there is no reset button near fuse panel behind glove box.

120

Asked by Dec 04, 2013 at 09:33 PM about the 2000 Pontiac Grand Prix GT Coupe

Question type: Maintenance & Repair

service engine soon light on.  Oreilly scan says its running too cold.  I changed
thermostat in case it was stuck open.  Heat works fine.  Tried the key on 3 pumps of
accelerator to reset, no change.  There is no button to reset in fuse box behind glove box.  
headlights are working.  Service engine soon light stays on.  Oil level is fine and at 60%
life left.

3 Answers

10,115

If the heat is working fine, then chances are it is just a faulty temp sensor.

120

two days after changing the thermostat, the light went back off. Probably only about ten miles worth of driving. I am going to get it rescanned to see if the code is gone. I am not sure how often it would recycle to clear the code after it was fixed. Oh and the gauge seems to be working properly again.

65,905

I believe the code is stored for 60 ignition cycles after the light goes off. HTH. -Jim

Your Answer

Add photo

Related Questions

  • I have a 2006 pontiac grand prix 3.8 v6 and the low beam light just shut down and no running lights? 33 answers

    I have tried replacing the bulbs and replaced the relay switch for the low beams i don't know where eles to look to find the problem?

    2006 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • Front headlights won't work 21 answers

    We have a 2007 Pontiac Grand Prix. We have replaced the bulbs and checked the fuse which was okay but the front headlights still will not come on. The bright head lights and running lights still wor...

    2007 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • My 1999 Pontiac Grand Prix trunk will not open 4 answers

    The remote, glove switch, and key will not open it. How do I get it open???

    1999 Pontiac Grand Prix 4 Dr GTP Supercharged Sedan

    -

    Maintenance & Repair

  • why won't my 02 Pontiac grand prix start? 47 answers

    I have replace the ignition control module, the battery, the alternator, and the fuel filter and at random times the car still won't crank. I can drive it a few places, turn it on or off a few times ...

    2002 Pontiac Grand Prix SE

    -

    Maintenance & Repair

  • Fuel pump not working on my 2000 Pontiac Grand Prix GT 3.8. 18 answers

    As instructed by Jim, I replaced the fuel pump relay (#32) in my manual, but this was not the problem and fuse # 14 was good. I am not sure what else it could be. I am not getting fuel from the pump. ...

    2000 Pontiac Grand Prix GT

    -

    General

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,857 nationwide Grand Prix listings starting at $1,500.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,160
#2 Tom Demyan
Tom Demyan
Reputation 2,830
#3 munron
munron
Reputation 2,180
View All

Related Models For Sale

Used Chevrolet Impala
589 Great Deals out of 31,465 listings starting at $799
Used Pontiac Bonneville
3 Great Deals out of 542 listings starting at $1,799
Used Pontiac Grand Am
1,226 listings starting at $1,999
Used Chevrolet Monte Carlo
18 Great Deals out of 1,384 listings starting at $1,995
Used Ford Mustang
454 Great Deals out of 45,522 listings starting at $1,999
Used Chevrolet Malibu
914 Great Deals out of 79,360 listings starting at $1,500
Used Chevrolet Camaro
206 Great Deals out of 30,790 listings starting at $1,217
Used Honda Accord
821 Great Deals out of 85,700 listings starting at $988
Used Pontiac Firebird
7 Great Deals out of 732 listings starting at $3,875

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
19 Great Deals out of 424 listings starting at $1,500
2007 Pontiac Grand Prix For Sale
4 Great Deals out of 395 listings starting at $2,500
2006 Pontiac Grand Prix For Sale
453 listings starting at $2,675
2005 Pontiac Grand Prix For Sale
4 Great Deals out of 347 listings starting at $1,895

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.