2017 Sonata 2.4L Engine Knocking and High Oil Use - P1326 Code

ClearTheCode guidance (Hyundai · Buying & ownership)

Summary: For 2017 Sonata 2.4L Engine Knocking and High Oil Use - P1326 Code, 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: My 2017 Hyundai Sonata SE with the 2.4L GDI engine has developed a concerning knocking noise, especially on cold starts. It sounds like it's coming from the engine bay. I've also noticed I'm adding a quart of oil every 1,500-2,000 miles, which seems excessive for a car with 80k miles.

Recently, the check engine light came on, and a scan pulled a P1326 code. I'm worried this is related to the know…

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