Reduced Engine Power 2008 Grand Prix

Asked by Oct 30, 2014 at 11:17 PM about the 2008 Pontiac Grand Prix Base

Question type: Maintenance & Repair

I have a 2008 Grand Prix. for the last two
weeks or so the reduced engine light has
been signaling I can go as fast as I want
but it takes a lot longer to speed up the
RPM's don't go over 1500 and when I shut
the car off and turn it back on the whole car
will shake. I took it into the shop but they
said everything looked OK with the
computer. I don't understand why it
happens so randomly I can be going 60
miles an hour or 20 and it just happens
randomly any ideas or suggestions would
be greatly appreciated. I don't know what
else to do. This is the only vehicle I have
owned I have had it for 4 years now and
this just recently started happening.

2 Answers


Catalytic converter might be plugged?


Have the shop check the throttle body sensor or the throttle body position? . That's what was wrong with mine. Bout 600$ to fix. But my car did the same exact thing.

Your Answer:

Pontiac Grand Prix Experts

  • #1
  • #2
    Tom Demyan
  • #3
View All

Related Models For Sale

Used Chevrolet Impala
442 Great Deals out of 25,964 listings starting at $950
Used Pontiac G8
6 Great Deals out of 342 listings starting at $5,000
Used Dodge Charger
301 Great Deals out of 32,310 listings starting at $1,850
Used Chevrolet Monte Carlo
4 Great Deals out of 952 listings starting at $2,950
Used Pontiac G6
40 Great Deals out of 2,807 listings starting at $699
Used Ford Mustang
268 Great Deals out of 38,445 listings starting at $1,350
Used Chevrolet Malibu
508 Great Deals out of 52,352 listings starting at $1,550
Used Dodge Challenger
151 Great Deals out of 24,047 listings starting at $7,995
Used Nissan Altima
754 Great Deals out of 67,300 listings starting at $1,495

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.