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Transmission rough shifting issue
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Thread: Transmission rough shifting issue

  1. #1
    Riding Lawn Mower
    Join Date
    Aug 2012
    Posts
    18
    Year
    2013
    Make
    KIA
    Model
    OPTIMA
    Trim
    SX

    Transmission rough shifting issue

    So my wife's Optima SX has gone through about 3 weeks of rough shifting (hard shifts both up and down, staying in lower gear and high rpms etc). I read about the transmission temp sensor and how it could possibly be bad and causing this issue.

    It finally threw a code after about 3 weeks of rough shifting: P0711. So I brought it in to the dealer today. I tried to get them to order the sensor prior to appointment stating that the "P0711" code CEL was lit, but they absolutely refused.

    So diagnosis, mechanic thinks that sensor is OK but there is a pin on the harness that is bad. So they are ordering a new harness/connector. I'm kind of skeptical on the "bad pin" theory...

    Has anyone had this issue resolved with their rough shift transmission issue?

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  3. #2
    Learner's Permit
    Join Date
    Jul 2015
    Posts
    137
    Year
    2012
    Make
    Kia
    Model
    2012 Kia Optima Lx
    Trim
    Lx
    That exact same thing happened to me. Water somehow got in there and corroded a few pins.

  4. #3
    Riding Lawn Mower
    Join Date
    Aug 2012
    Posts
    18
    Year
    2013
    Make
    KIA
    Model
    OPTIMA
    Trim
    SX
    OK. I feel better. Thanks for posting Frank!

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  6. #4
    Riding Lawn Mower
    Join Date
    Aug 2012
    Posts
    18
    Year
    2013
    Make
    KIA
    Model
    OPTIMA
    Trim
    SX
    so I finally got the transmission fixed. Said they tightened the bolt on the harness and replaced the sensor. Filled the trans with fresh fluid.

    So the next day my wife tells me the backup camera is not working. WTH! I'm wondering if the camera wiring runs through the harness that the tech tightened up or he may have possibly removed some wiring to do the repair and didn't reconnect. I mean what are the odds of the camera going bad RIGHT after the repair?

    Anyone else have the backup camera fail?

  7. #5
    Riding Lawn Mower
    Join Date
    Nov 2015
    Location
    Chicago
    Posts
    34
    Year
    2013
    Make
    Kia
    Model
    Optima SX
    Yes I have had a camera replaced there is a known issue with them in high humidity climates.

  8. #6
    Riding Lawn Mower
    Join Date
    Jan 2017
    Location
    cypress, california
    Posts
    31
    Year
    2011
    Make
    kia
    Model
    kia optima
    Trim
    gdi
    man, I have only had my optima a few days and all these posts are scaring the crap out of me.

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  10. #7
    Riding Lawn Mower Joreskin's Avatar
    Join Date
    Aug 2012
    Location
    Borden, Ont
    Posts
    43
    I'm having the same issue with rough shifting for a few weeks and then the check engine light coming on today. I'm going to borrow a code reader to get the error code.
    My question is: If it is a temp sensor, why does it cause the rough shifting?
    2012 Santorini Blue SX Fully Loaded
    TSW Nurburgrings 18 x 8.5 35mm offset
    Nokian WR 225/40 R18 on stock SX rims(Winter)

    Mods:
    - Debadged "Optima" and "SX"
    - Red calipers
    - Flying K all around
    - SRT-4 BOV
    - DIY Led Door Handles
    - Brake Flasher
    - LED Interior
    - LED Reverse
    - 17% tint on back windows
    - 35% tint on front windows

  11. #8
    Senior Wrench Monkey
    Join Date
    May 2015
    Location
    NJ
    Posts
    996
    Year
    2011
    Make
    Kia
    Model
    Optima
    Trim
    EX-T
    Temp sensor will cause very rough shifting, as like many items on the Kia, it's a known failure item. Cheap and fairly easy to replace. Most just replace the sensor, but I believe the Hyundai replacement comes with the harness that at times goes south, but requires a little more work.

    I thought my transmission was going to drop out of the car when cold as the trans was erratic and harsh to say the least, but after warm up it was fine. Funny part is that never had a problem until the KSDS update was performed and the car acted up within 1 mile from the dealership, but of course their response was that nothing they did would have caused the sensor to go bad. Naturally, I couldn't prove otherwise, so swallowed hard, bit my tongue and replaced the sensor, good to go until the next item self destructs.

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