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Jeep Grand Cherokee Hesitation

Asked by: 28 views Troubleshooting Question

I have a 2010 Jeep Grand Cherokee Laredo 3.7 V6 with 69,000 miles. It sometimes hesitates immediately after I start it up, and lasts for about a minute or two before it clears up and runs fine. Sometimes I get a CEL, and sometimes it flashes briefly. It usually resets soon after until it does it again later on. Weather conditions don’t seem to be a factor as it’s happened in the cold and when it’s warmer out. May also happen after the vehicle has been parked all day, or if it’s only been a brief time since it last ran. The only code I’ve managed to get is for a misfire in Bank #3. I’ve found this seems to be fairly common, but there appears to be a number of possible fixes. I have an extended warranty, but it’s $100 just to figure out what’s going on, and it may not be covered. I’d like to get some advice on a possible cause. Thank you.


5 Answers

  1. 0 Votes Thumb up 0 Votes Thumb down 0 Votes


    Do you have a more specific DTC code number?

    Normally a V-engine uses 2 banks
    1 bank for each side of the engine. Are you sure the trouble code wasn’t cylinder 3? etc P0303

    If there is a trouble code on a specific cylinder all the time, the problems getting easier. For example if you are getting misfires on cylinder 3 you should check/replace the plug and coil.

    so if you can get the exact trouble code number etc P0303 it would be nice
    You can read this article out if you want to learn a bit more of misfires

    Ask A Mechanic Admin - Mar 28, 2018 |Reply

  2. 0 Votes Thumb up 0 Votes Thumb down 0 Votes

    Thanks for your quick response. I’m sorry, it was a p0303 cylinder 3 misfire. Sometimes steady, sometimes flashes. I guess I discounted the plugs since its so random and sporadic, but now I’m wondering if I should try a new ignition coil on cylinder 3. I think it seems fairly easy to get to as opposed to the others. I’m looking at the middle one on the drivers side. New MAP sensor came today, so I might give that a shot too.

    Chris004 - Mar 28, 2018 |Reply

  3. 0 Votes Thumb up 0 Votes Thumb down 0 Votes

    Just wanted to add that I’m now getting P0300 and P0303. Thanks!

    Chris004 - Mar 28, 2018 |Reply

  4. 0 Votes Thumb up 0 Votes Thumb down 0 Votes

    The P0300 code is a misfire on multiple cylinders/ unknown. Normally it would put that trouble code if it cant identify on what cylinder the misfire was.

    But because you have a P0303 code, I think you should focus on that.
    Start with replacing plug and coil on cylinder 3, and check connectors. This should be the cylinder order!

    jeep cylinder order

    Ask A Mechanic Admin - Mar 28, 2018 |Reply

  5. 0 Votes Thumb up 0 Votes Thumb down 0 Votes

    Thank you! I just ordered a new coil pack. I will give that a try and take it from there. Much appreciated.

    Chris004 - Mar 29, 2018 |Reply

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