what does the code p0305 and p0740 mean on a pontiac grand prixx gt

Asked by Apr 07, 2017 at 11:58 PM about the 2005 Pontiac Grand Prix

Question type: Maintenance & Repair

2 Answers

97,735

P0305 is misfire on cylinder number 5 and P0740 is torque converter clutch circuit malfunction. The torque converter clutch is in the transmission. HTH. -Jim

30,655

Before pulling that torque converter clutch go threw the wiring to the trans, sometimes its just a exposed wire touching & rubbing on metal. The misfire; check the spark plug for resistance and see if its running rich/lean/hot/oily/moisture on it ect, test coil for low/no voltage out to that cylinder, look for oily coil & cracks or swelling plastic casing(if coil usually will be 2 cylinders are misfiring), check/replace the wire set to spark plugs if one is bad, fuel injector weak or leaky may need cleaned or replaced or its wire harness is shorted/open/connector loose/dirty. Vacuum leak on intake manifold near that cylinder, Worn Rings/Valve Seals,

1 people found this helpful.

Your Answer:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    5,340
  • #2
    munron
    Reputation
    3,680
  • #3
    Dorian Hendricks
    Reputation
    2,800
View All

Related Models For Sale

Used Chevrolet Impala
32 Great Deals out of 1,001 listings starting at $1,495
Used Dodge Charger
36 Great Deals out of 929 listings starting at $4,995
Used Pontiac Grand Am
19 listings
Used Chevrolet Monte Carlo
11 listings starting at $3,750
Used Pontiac G6
106 listings starting at $4,495
Used Pontiac GTO
5 listings
Used Chevrolet Malibu
48 Great Deals out of 2,100 listings starting at $2,995
Used Ford Mustang
32 Great Deals out of 1,766 listings starting at $3,999
Used Chrysler 300
30 Great Deals out of 891 listings starting at $4,499
Used Buick LaCrosse
5 Great Deals out of 417 listings starting at $5,491

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. Content will be removed if CarGurus becomes aware that it violates our policies.