Mitsubishi Outlander “TRANSMISSION SERVICE REQUIRED” Message
The “TRANSMISSION SERVICE REQUIRED” message in a Mitsubishi Outlander indicates an issue with the vehicle’s transmission system that needs immediate attention. Understanding the potential causes and necessary actions is crucial.
Possible Causes
- Transmission Fluid Issues:
- Low or Degraded Fluid: Low or degraded transmission fluid can cause malfunction. Regular maintenance, including fluid changes every 30,000 to 60,000 miles, is essential to prevent such issues.
- Contamination: Contaminants in the fluid can affect the hydraulic pressure circuit and other internal components, leading to transmission problems.
- Transmission Sensors:
- Faulty Sensors: Malfunctioning sensors can trigger the warning message. For example, a faulty sensor can cause erratic shifting or hesitation, which the vehicle’s computer system detects as a problem.
- Mechanical Issues:
- Solenoids and Clutches: Problems with solenoids or clutches can cause shifting issues, leading to the service warning.
- CVT-Specific Problems: The Continuously Variable Transmission (CVT) can experience issues such as belt slippage, miscalibration of the control unit, and inadequate cooling.
- Software and Calibration:
- Miscalibration: Sometimes, the issue may be related to the software controlling the transmission. A miscalibration can cause improper shifting and trigger the service warning.
Common Symptoms
Owners of Mitsubishi Outlanders have reported various symptoms associated with transmission issues, including:
- Jerking and Shuddering: The vehicle may jerk or shudder during acceleration.
- Hesitation: Noticeable hesitation or delay when shifting gears or accelerating.
- Unusual Noises: Loud noises, such as banging or excessive whirring, from the transmission.
Recommended Actions
If the “TRANSMISSION SERVICE REQUIRED” message appears, take the following steps:
- Check Transmission Fluid: Ensure the transmission fluid is at the correct level and in good condition. If necessary, have it flushed and replaced.
- Visit a Professional: Take the vehicle to a certified Mitsubishi service center or a qualified mechanic to diagnose the issue. They can use diagnostic tools to read error codes and pinpoint the problem.
- Avoid Driving: If the transmission is acting erratically or the warning light persists, avoid driving the vehicle until it has been inspected to prevent further damage.
Warranty and Recalls
Mitsubishi offers a 10-year/100,000-mile warranty on their vehicles, which may cover transmission repairs if the vehicle is still under warranty. Additionally, Mitsubishi has issued technical service bulletins and recalls for certain transmission issues, so it is worth checking if your vehicle is affected.
Conclusion
The “TRANSMISSION SERVICE REQUIRED” message in a Mitsubishi Outlander is a critical warning that should not be ignored. Addressing the issue promptly by checking the transmission fluid and consulting a professional can prevent more severe problems and ensure the vehicle’s longevity and safety.
| Issue Type | Potential Causes | Symptoms | Recommended Actions |
|---|---|---|---|
| Transmission Fluid | Low or degraded fluid, contamination | Jerking, shuddering, hesitation | Check fluid level, flush if needed |
| Transmission Sensors | Faulty sensors | Erratic shifting, hesitation | Professional diagnosis, sensor check |
| Mechanical Issues | Solenoids, clutches, CVT-specific problems | Unusual noises, loss of power | Visit certified mechanic |
| Software and Calibration | Miscalibration, software issues | Improper shifting | Professional recalibration |
Citations:
[1] EvolutionM Forums
[2] MyLemon Blog
[3] JustAnswer Mitsubishi
[4] Mike Kelly Mitsubishi
[5] Mitsubishi Forum