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2018 Outlander CVT Shuddering and Transmission Warning Light

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Brian F. · rep 0 · May 22, 5:37 AM · 1 replies · solved · Question

Vehicle: 2018 Mitsubishi Outlander SEL

Hey everyone,

I'm having some worrying issues with my 2018 Mitsubishi Outlander SEL, which has about 85,000 miles on it. Lately, when I'm accelerating, especially from a stop or at lower speeds, the car shudders pretty noticeably. It feels like the transmission is struggling to engage properly.

To make matters worse, the check engine light came on a few days ago, and now I'm also seeing a 'Transmission Service Required' message pop up intermittently on the dash. I'm really concerned this might be a major CVT problem. Has anyone else experienced this with their Outlander, particularly around this model year?

What could be causing this, and what kind of repair costs am I looking at? Is this a known reliability issue for these models? Any advice on what I should check first or what questions to ask a mechanic would be greatly appreciated.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:37 AM

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ClearTheCode admin answer:

It sounds like you're experiencing classic symptoms of a continuously variable transmission (CVT) issue, which unfortunately can be a common concern for many vehicles, including some Mitsubishi Outlanders from that era. Addressing this promptly is crucial to prevent further damage.

  1. Common Causes:

    • Degraded Transmission Fluid: Over time, CVT fluid can break down, losing its lubricating and friction-modifying properties. This can lead to shuddering, slipping, and overheating.
    • Worn Valve Body or Solenoids: The valve body controls fluid pressure and flow within the transmission. Worn solenoids or a faulty valve body can cause incorrect pressure, leading to engagement issues.
    • Failing Torque Converter: The torque converter can develop internal issues, leading to shuddering, especially during acceleration.
    • Sensor Malfunctions: Speed sensors or pressure sensors within the CVT can send incorrect data to the transmission control module (TCM), causing erratic behavior and warning lights.

  2. Potential OBD-II Codes: When your check engine light comes on, common codes associated with CVT issues include:

    • P0741: Torque Converter Clutch Circuit Performance or Stuck Off
    • P0776: Pressure Control Solenoid 'B' Performance/Stuck Off
    • P0700: Transmission Control System Malfunction (a generic code indicating a TCM fault)
    • P0715, P0720: Input/Output Speed Sensor Circuit Malfunction

  3. When to See a Shop: You should take your Outlander to a qualified mechanic or a Mitsubishi dealership immediately. Continuing to drive with these symptoms can exacerbate the problem, potentially leading to a complete transmission failure, which is significantly more expensive to repair or replace than addressing the issue early.

  4. Recommended Steps:

    • Professional Diagnosis: Have the vehicle scanned for diagnostic trouble codes (DTCs) using a professional-grade scanner. This will provide specific insights into the nature of the fault.
    • Fluid Inspection: Ask the technician to check the CVT fluid level and condition. If the fluid is dark, burnt, or contains metallic particles, it's a strong indicator of internal wear.
    • Test Drive and Inspection: A skilled technician will perform a test drive to confirm the symptoms and may inspect for any external leaks or wiring issues.

Be prepared for potential repair costs, as CVT repairs can range from fluid flushes and solenoid replacements to full transmission overhauls or replacements, which can be substantial.

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