Understanding the Engine Management Issue
During cold-start conditions, affected vehicles may experience an ECU (Engine Control Unit) software malfunction that delivers incorrect fuel quantities to the combustion chamber. This technical defect can manifest through several symptoms:
- Audible engine knocking - A distinct metallic pinging sound during acceleration
- Reduced engine performance - Noticeable power loss during cold operation
- Potential long-term damage - In severe cases, prolonged knocking can lead to piston or bearing damage
Technical Root Cause
The issue stems from an algorithmic error in the engine management software's cold-start fuel mapping tables. When ambient temperatures drop below 50°F (10°C), the current programming may calculate improper air-fuel ratios during the warm-up phase.
Affected Vehicles
This service bulletin specifically applies to:
- 2014 Mitsubishi Mirage (all trim levels)
- 2015 Mitsubishi Mirage (all trim levels)
Note that vehicles produced after June 2015 contain the updated software and are not affected.
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Official Resolution
Mitsubishi has developed a comprehensive solution that authorized dealerships will implement:
Service Details
- Procedure typically takes 45-60 minutes
- No physical parts replacement required
- Includes post-update diagnostic verification
- Updated software improves cold-start performance and fuel economy
Warranty Coverage Information
Mitsubishi is covering this essential update under its manufacturer warranty programs:
- New Vehicle Limited Warranty: Applies to vehicles within 5 years/60,000 miles
- Powertrain Warranty: Covers vehicles within 10 years/100,000 miles
Even if your warranty has expired, Mitsubishi may cover this specific repair - contact your dealer for confirmation.
Owner Action Required
If you own an affected Mirage, follow these steps:
- Verify inclusion: Contact any Mitsubishi dealer with your VIN (Vehicle Identification Number)
- Schedule service: Book an appointment at your convenience
- Prepare for visit: Mention TSB No. SC-16-001R when scheduling
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Contact Information
- Mitsubishi Customer Support: 888-648-7820
- NHTSA Vehicle Safety Hotline: 888-327-4236
- MotorVero Service Locator: Find Authorized Mitsubishi Service Centers
Why This Update Matters
Beyond resolving the immediate knocking concern, this software update provides several benefits:
- Enhanced engine longevity: Proper fuel delivery reduces wear on critical components
- Improved cold-weather drivability: Smoother acceleration during warm-up
- Better fuel efficiency: Optimized mapping can improve MPG in cold climates
- Increased resale value: Documented TSB completion maintains vehicle history
Frequently Asked Questions
How urgent is this repair?
While not an immediate safety risk, prolonged operation with the knocking condition can accelerate engine wear. Schedule service at your earliest convenience.
Can I continue driving my vehicle?
Yes, but avoid aggressive acceleration during cold starts. If knocking becomes severe or persistent, reduce driving until the update is performed.
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Will this update affect my vehicle's performance?
The update maintains all original performance specifications while eliminating the cold-start knocking behavior.
Checking for Other Service Bulletins
Manufacturers regularly issue technical service bulletins to address various vehicle concerns:
- Visit Mitsubishi's official owner portal for complete bulletin listings
- Register your vehicle for direct notifications
- Check the NHTSA website for recall information
Next Steps for Mirage Owners
Take advantage of this no-cost software update to ensure your vehicle operates at peak performance. Use MotorVero's dealer locator to find your nearest authorized Mitsubishi service center and schedule an appointment today.
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