The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2018 Sorento Battery Draining Overnight - Replaced Battery, Still Dying

0

Tom H. · rep 0 · May 22, 3:08 AM · 1 replies · solved · Question

Hey everyone, I'm at my wit's end with my 2018 Kia Sorento EX. For the past few weeks, the battery keeps dying overnight. I thought it was just an old battery, so I replaced it with a brand new one last weekend.

Unfortunately, the problem persists. If I don't drive it for 12-18 hours, it's completely dead. I have to jump-start it every time. I've checked for lights left on, but everything seems off.

Could this be a parasitic draw? What should I be looking for? Any common issues with the Sorento's electrical system that could cause this?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:08 AM

0

ClearTheCode guidance (Kia · Electrical & electronics)

Summary: For 2018 Sorento Battery Draining Overnight - Replaced Battery, Still Dying, 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 at my wit's end with my 2018 Kia Sorento EX. For the past few weeks, the battery keeps dying overnight. I thought it was just an old battery, so I replaced it with a brand new one last weekend.

Unfortunately, the problem persists. If I don't drive it for 12-18 hours, it's completely dead. I have to jump-start it every time. I've checked for lights left on, but everything seems o…

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

Menu

Help & account