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2017 Outlander Sport SE - Transmission Limp Mode & Warning Light

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Robert C. · rep 0 · May 22, 5:30 AM · 1 replies · solved · Question

Vehicle: 2017 Mitsubishi Outlander Sport SE

I'm having some serious issues with my 2017 Mitsubishi Outlander Sport SE, which has about 80,000 miles on it. While driving, the transmission occasionally feels sluggish, like it's struggling to shift, and sometimes it just goes into 'limp mode.'

When it enters limp mode, a transmission warning light comes on, and the car won't go above 30-40 MPH. Turning the car off and on usually resets it, but the problem keeps coming back. I haven't pulled any specific OBD-II codes yet, but I'm worried about the CVT.

Has anyone experienced similar issues with their Outlander Sport? What could be causing this, and what should I check before heading to a dealership?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:30 AM

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ClearTheCode admin answer:

Transmission issues, especially with Continuously Variable Transmissions (CVTs) like those in your 2017 Mitsubishi Outlander Sport SE, can be complex and often require professional diagnosis. When your vehicle enters 'limp mode,' it's the car's computer protecting the transmission from further damage by limiting power and speed.

Even without a Check Engine Light, a dedicated transmission warning light usually indicates that a diagnostic trouble code (DTC) is stored in the Transmission Control Module (TCM). A standard OBD-II scanner might not read all TCM-specific codes (P07xx series), so a more advanced scanner or a visit to a shop might be necessary.

Here are common causes and initial checks:

  1. Low or Contaminated Transmission Fluid: This is a primary cause of CVT issues. Check your CVT fluid level according to your owner's manual (usually with the engine warm and running). Look for dark, burnt-smelling fluid, which indicates overheating or internal wear. Mitsubishi CVTs are very sensitive to fluid type; ensure the correct fluid (e.g., Mitsubishi DiaQueen CVT Fluid J4) was used if it was ever serviced.
  2. Transmission Temperature Sensor: An overheating CVT can trigger limp mode. A faulty temperature sensor might report incorrect temperatures, causing the TCM to engage limp mode prematurely or fail to detect actual overheating.
  3. Valve Body or Solenoid Issues: The valve body controls fluid pressure and flow within the CVT. Faulty solenoids within the valve body can lead to incorrect pressure, causing shifting problems and limp mode. Common codes here might include P0741 (Torque Converter Clutch Circuit Performance or Stuck Off).
  4. Speed Sensors: Input or output speed sensors can fail, causing the TCM to lose track of transmission speed, leading to erratic behavior and limp mode.
  5. Internal CVT Wear: Over time, the belt and pulleys within the CVT can wear, leading to slippage and performance issues. This is often a more severe and costly repair.

When to See a Shop:

  • Immediately: If the problem is frequent or severe, continued driving in limp mode can exacerbate internal damage.
  • For Advanced Diagnostics: A professional shop with a specialized scan tool can read TCM-specific codes (P07xx series) that a basic OBD-II scanner might miss. These codes are crucial for pinpointing the exact issue.
  • For Fluid Service: If the fluid is low or contaminated, a proper CVT fluid change (not just a drain and fill) is critical and should be done by someone familiar with Mitsubishi CVT procedures.
  • For Internal Repairs: Any issues with the valve body, solenoids, or internal CVT components require expert transmission technicians.
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