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2020 Nautilus Reserve Rough Idle & Check Engine Light - Misfire?

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Eric V. · rep 0 · May 22, 7:59 AM · 1 replies · solved · Question

Hey everyone, I'm hoping someone can help me out with an issue I'm having with my 2020 Lincoln Nautilus Reserve. It has about 65,000 miles on it.

About a week ago, the check engine light came on, and since then, I've noticed a really rough idle, especially when I'm stopped at a light or in slow traffic. It feels like the engine is shaking more than usual, and sometimes it even feels like it's going to stall, though it hasn't yet.

I also feel a slight hesitation when I accelerate from a complete stop. It's not a huge power loss, but it's definitely noticeable and wasn't there before. I haven't had a chance to get the OBD-II codes read yet, but I'm wondering if this sounds familiar to anyone else with a Nautilus or similar Lincoln model.

Could this be a misfire, or something more serious? Any advice on what I should check first before taking it to a mechanic would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 7:59 AM

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ClearTheCode guidance (Lincoln · Diagnostics & codes)

Summary: For 2020 Nautilus Reserve Rough Idle & Check Engine Light - Misfire?, work through these steps on your 2016+ vehicle:

  1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
  2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
  3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
  4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
  5. Test the common fix — follow model-specific service procedures; one change at a time.
  6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: Hey everyone, I'm hoping someone can help me out with an issue I'm having with my 2020 Lincoln Nautilus Reserve. It has about 65,000 miles on it.

About a week ago, the check engine light came on, and since then, I've noticed a really rough idle, especially when I'm stopped at a light or in slow traffic. It feels like the engine is shaking more than usual, and sometimes it even feels like it's goi…

This is educational guidance, not a substitute for hands-on diagnosis.

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