Flashing O/D light and transmission shifting

Discussion in 'Hyundai Accent' started by zrakoplov, Nov 28, 2021.

  1. zrakoplov

    zrakoplov

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    2008 Accent, A/T. In cold weather the O/D light on the dashboard will flash about once per second as soon as the vehicle is started. Once the vehicle warms up, it stays off. Occasionally when driving the O/D light will quickly flash and the transmission will shift from 4th to 3rd and then back to 4th. I've confirmed that it's not the control wire or button on the shifter. The overdrive button works normally when the problem is not happening. Overdrive works fine, pushing the button takes it in and out of overdrive just fine. I've traced the wiring from the button all the way to the ECU and nothing appears to be damaged. Disconnected the O/D button for a while and the problem still happened. Checked the connectors on the ECU and the intermediate connectors in the under hood fuse box. No codes are being recorded, at least none that my small code reader can see. Anyone else that has seen this? I'm thinking the flashing O/D lamp is telling me that something in the transmission is not right but without a code it makes no sense. I'm thinking I may need a better code reader to capture the data. BTW, in very hot weather (it gets 100 degrees + here in the summer) the problem never occurs. Thanks for any leads and info.
     
    zrakoplov, Nov 28, 2021
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  2. zrakoplov

    mustafa.muhamed

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    i had the same problem on accent 2010 , if you solve this problem could you please share the way to solve it
     
    mustafa.muhamed, Dec 14, 2021
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