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2019 Kona Ultimate Transmission Shifting Hard - P0700 Code

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Laura J. · rep 0 · May 22, 2:57 AM · 1 replies · solved · Question

Vehicle: 2019 Hyundai Kona Ultimate

Hey everyone,

My 2019 Hyundai Kona Ultimate, 1.6T engine with the 7-speed DCT, has recently started shifting very harshly, especially between 1st and 2nd gear, and sometimes when downshifting. It feels like a jolt.

I scanned it and got a P0700 code, which points to a Transmission Control System Malfunction. I know this is a generic code that means the Transmission Control Module (TCM) has detected a fault and stored a more specific code within its memory.

Has anyone experienced similar transmission issues with their Kona DCT? What specific codes did you find, and what was the resolution? I'm worried about the cost of a DCT repair.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 2:57 AM

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ClearTheCode admin answer:

The P0700 code on your 2019 Hyundai Kona Ultimate with the 7-speed Dual-Clutch Transmission (DCT) is indeed a general indicator that the Transmission Control Module (TCM) has detected a fault. This means there are more specific codes stored within the TCM that your standard OBD-II scanner might not be able to access. Hard shifting is a classic symptom of DCT issues.

Here's what commonly causes P0700 and hard shifting in Hyundai DCTs:

  1. Specific DCT Fault Codes: The P0700 is a request from the TCM to illuminate the Check Engine Light. A more advanced scanner (like those used by dealerships or specialized transmission shops) is needed to read the actual 'Pxxxx' codes stored in the TCM. These could include codes related to:
    • Clutch Actuator Malfunction: The DCT uses actuators to engage and disengage the clutches. If one is failing, it can cause harsh shifts.
    • Transmission Fluid Temperature Sensor: Incorrect readings can cause the TCM to operate the transmission improperly.
    • Transmission Range Sensor: Issues with detecting the correct gear position.
    • Solenoid Issues: Problems with the solenoids that control fluid flow within the transmission.
  2. Low or Contaminated Transmission Fluid: While DCTs are sealed units, fluid levels can sometimes be low from the factory or due to a leak. Contaminated or degraded fluid can also lead to poor shifting performance. DCTs use specific fluid types, so ensure any checks or top-offs use the correct fluid.
  3. TCM Software Glitch: Sometimes, a simple software update for the TCM can resolve shifting anomalies. This is less common for hard shifts but worth considering.
  4. Internal Transmission Wear: Unfortunately, internal wear on clutch packs or other components within the DCT can lead to these symptoms. The 7-speed DCTs have had some reported issues, though many operate flawlessly.

When to See a Shop:

  • Given the P0700 code and harsh shifting, it is highly recommended to take your Kona to a Hyundai dealership or a transmission specialist as soon as possible.
  • They have the necessary diagnostic tools to read the specific TCM codes, which are crucial for accurate diagnosis.
  • Continuing to drive with a transmission issue can lead to more severe and costly damage. Early diagnosis can sometimes prevent a full transmission replacement.
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