Limp mode

Discussion in 'Hyundai Sonata' started by Turtle, Jul 4, 2019.

  1. Turtle

    Turtle

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    I had the software update done to my 2018 Sonata 2.4 l a month ago. While on vacation my Sonata decided to go into limp mode. It was the knocksenor wiring harness that was the culprit. The factory harness is too taunt and routed too close to body,frame causing a odd frequency to snap the ECM into safe ( limp ) mode. I had it flatdecked to a Hyundai dealership , who had a harness in stock, cut to the chase it's in works great. All under warranty!!
     
    Turtle, Jul 4, 2019
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  2. Turtle

    avisitor

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    Thanks for the information.
    It might help someone
     
    avisitor, Jul 4, 2019
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  3. Turtle

    Confuoco1

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    My 2016 did that. I have 62,000 mile's on my Sonata. Flashing engine light, new wiring harness. Took 3 weeks, but they always gave me a free rental. Drove it 1 weeks engine light flashed again, they tightened down the knock sensor. Two days later, the engine light flashed again, they replaced the knock sensor. Two days later, the engine light flashed again. Now they are installing a new motor. It's all covered under warranty. None of it cost me a penny. I'm getting a new $9000 motor, and I only paid $10,500 for the car.
     
    Confuoco1, Jul 6, 2019
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