Own a Mitsubishi Triton MQ/MR or Pajero Sport with the 4N15 engine? If you’ve just changed the oil and are still seeing warning lights or DPF issues, you might’ve missed one key step — resetting the oil dilution counter. This critical service function tells your engine's ECU that the oil has been replaced, especially important in diesel models with a DPF. In this guide, we’ll show you the top 4 OBD scan tools that can properly reset the oil dilution counter on your Triton, avoid limp mode, and keep your engine running smoothly.

In this article, we’ll cover:

• What the oil dilution counter is in specific
• Why it matters for Mitsubishi Triton & Pajero Sport owners
• Our recommended OBD tools for DIYers and professionals

What Is an Oil Dilution Counter Reset?

Modern diesel engines (in the Triton's and Pajero Sport's case the 4N15 engine) use post-injection to burn off soot from the DPF. Over time, excess fuel can seep past the piston rings and dilute the engine oil.

Your Triton’s ECU tracks this using a calculated oil dilution value. If it gets too high, the vehicle may:

• Trigger warning lights / DTCs
• Prevent DPF regeneration
• Enter limp mode

Changing the oil alone isn’t enough. The ECU must be told the oil has been replaced — this is done by resetting the oil dilution counter with a compatible scanner.

Why This Function Is Critical for Mitsubishi Triton & Pajero Sport Drivers

This reset is especially important if you:

• Drive short trips (which interrupt passive DPF regeneration)
• Tow or go off-road regularly
• Faced with fault codes like P252F (engine oil deterioration) after servicing

Many Triton owners experience confusion after changing their oil, only to still see warnings or experience performance issues — because the oil dilution counter wasn’t reset.

Top Scan Tools for Mitsubishi Triton & Pajero Sport Oil Dilution Reset

Here are our top 4 OBD scan tool recommendations — all tested to support oil service reset (and oil dilution counter reset) and other Mitsubishi-specific maintenance functions like DPF regen, injector coding, SQL (small qty learn) and more (model and vehicle dependent). 

1. Vident i705 (Mitsubishi-Specific)

• Best for: DIYers focused on Mitsubishi & Nissan specific vehicles
• Functions: Oil dilution reset, DPF regen, injector coding
• Pros: Affordable, brand-specific, compact and easy to use

2. Vident iSmart600 Max (Android Touchscreen)

• Best for: All-rounders who want touchscreen convenience and multi-vehicle access
• Functions: Oil reset, special functions, advanced diagnostics
• Pros: Covers 130+ makes, Bluetooth VCI, full system scans, budget-friendly

3. Autel MaxiCheck MX808S

• Best for: Professionals or DIYers servicing various brands
• Functions: Oil reset, DPF regen, injector coding, battery reg
• Pros: Good processor for ease of use, broad vehicle coverage of latest model releases

4. Launch X431 V PROS Elite

• Best for: Workshops wanting dealer-level coverage
• Functions: Oil exchange reset, entry level programming and coding, DPF regen, etc. 
• Pros: Professional-grade features, fast processor, easy to use

Conclusion

If you’ve just serviced your Mitsubishi Triton MQ/MR or Pajero Sport with the 4N15 engine, resetting the oil dilution counter is not optional — it’s essential. Skipping this step can prevent DPF regeneration, trigger fault codes like P252F, or even put your vehicle into limp mode. The good news? With the right OBD scan tool, you can reset the counter in minutes and avoid expensive trips to the dealer.

Each tool we’ve recommended is tested, Triton-compatible, and packed with features to support vehicle maintenance. Whether you're a DIYer or workshop professional, you’ll find a scanner that fits your needs.

Please reach out to us directly to check full compatibility of your vehicle before buying to be sure you pick the right tool for your specific model. 

For a deeper dive into our top Mitsubishi scan tool picks — including specs, features, and real-world performance — check out our full guide: Best OBD Scan Tools in Australia for Mitsubishi and Nissan | Top Picks 2024

→ Browse our full scan tool range here or reach out to us directly on 0386588894.