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2018 Elantra CVT Hesitation and Jerking

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Sarah K. · rep 0 · May 25, 2:00 AM · 1 replies · solved · Question

Vehicle: 2018 Hyundai Elantra Limited

Hi all,

I'm looking for some input on my 2018 Hyundai Elantra Limited. It has the IVT (Intelligent Variable Transmission), which I believe is Hyundai's version of a CVT. Lately, I've been experiencing some really frustrating issues with it.

When I accelerate from a stop, there's often a noticeable hesitation before the car actually starts moving smoothly. It feels like it's slipping or struggling to engage. Sometimes, especially at lower speeds, I also feel a distinct jerking sensation, almost like the transmission is confused about what it's supposed to be doing. There's no check engine light on, so no specific OBD codes to report yet.

My Elantra has about 60,000 miles on it. Is this a common problem with these IVTs? What could be causing this, and what kind of repairs am I looking at? Any advice is welcome!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:00 AM

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ClearTheCode admin answer:

Your experience with hesitation and jerking in your 2018 Hyundai Elantra's Intelligent Variable Transmission (IVT), also known as a CVT, is not uncommon. While CVTs offer smooth, gearless acceleration when functioning correctly, they can exhibit these symptoms when issues arise. Although you don't have a specific OBD code yet, a P0700 (Transmission Control System Malfunction) or P0730 (Incorrect Gear Ratio) might appear if the problem worsens.

Here are the common causes and steps to take:

  1. Fluid Condition: The most common culprit for CVT performance issues is the transmission fluid. Over time, CVT fluid can degrade, lose its friction properties, or become contaminated. Low fluid levels can also cause problems. Ensure the correct type of CVT fluid is used for replacement.
  2. Transmission Belt/Pulleys: Inside the CVT, a steel belt runs between two variable-width pulleys. Wear on these components can lead to slipping, hesitation, and jerking as the system struggles to maintain the correct ratio.
  3. Valve Body Issues: The valve body controls the hydraulic pressure that operates the pulleys. Malfunctions in the valve body can lead to incorrect pressure, causing erratic transmission behavior.
  4. Software Glitches: Sometimes, the Transmission Control Module (TCM) software can have glitches or require an update to optimize shifting and engagement.
  5. Sensor Malfunctions: Speed sensors or other transmission-related sensors can send incorrect data to the TCM, leading to poor performance.

When to See a Shop:

  • Immediately: If the jerking becomes severe, or if you notice any grinding noises or a sudden loss of power, get to a shop right away.
  • Soon: Even without a check engine light, consistent hesitation and jerking warrant a professional diagnosis. Continuing to drive with these symptoms can accelerate wear and lead to more costly repairs.

What to Expect at the Shop:

  • A technician will likely start by checking the transmission fluid level and condition.
  • They will perform a diagnostic scan, even without a check engine light, to look for pending codes or unusual sensor readings.
  • They may also check for available software updates for the TCM.
  • Depending on the findings, a transmission flush, valve body repair, or even transmission replacement might be recommended. Early intervention can sometimes prevent the need for a full replacement.
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