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

11,265

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.

80,345

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

Your Answer:

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 1,684 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
525 Great Deals out of 26,142 listings starting at $995
Used Chevrolet Monte Carlo
4 Great Deals out of 978 listings starting at $1,125
Used Pontiac Bonneville
3 Great Deals out of 331 listings starting at $2,900
Used Pontiac Grand Am
735 listings starting at $2,490
Used Chevrolet Malibu
629 Great Deals out of 51,317 listings starting at $1,550
Used Chevrolet Camaro
259 Great Deals out of 27,088 listings starting at $2,900
Used Ford Mustang
296 Great Deals out of 39,978 listings starting at $1,312
Used Pontiac Firebird
5 Great Deals out of 692 listings starting at $3,995
Used Nissan Altima
842 Great Deals out of 61,866 listings starting at $1,000
Used Honda Accord
706 Great Deals out of 102,595 listings starting at $999

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
8 Great Deals out of 265 listings starting at $1,690
2007 Pontiac Grand Prix For Sale
237 listings starting at $2,295
2006 Pontiac Grand Prix For Sale
3 Great Deals out of 281 listings starting at $1,500
2005 Pontiac Grand Prix For Sale
217 listings starting at $1,995

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.