The Original i30 Owners Club
GOT PROBLEMS OR ISSUES? => DIESEL => Topic started by: dominic001 on April 14, 2025, 22:42:27
-
Hi all, hoping someone can shed some light or share a similar experience. Here’s a breakdown of the issues I’ve been dealing with:
What I’ve Done So Far:
- Replaced the oil pressure sensor
- Replaced the oil filter
- Refilled with fresh 5W-30 (correct spec)
- Oil level is correct and up to the fill mark
The problem
- The yellow oil pressure light comes on after ~30 miles of driving
- No noticeable engine noise or performance issues when the light comes on
- Oil level remains fine
- This only happens after the engine is hot, which made me suspect a real drop in oil pressure (possibly due to oil thinning)
What i have found out while trying to diagnose
- After driving and letting the car idle, I noticed the radiator fan never turns on
- Even when the A/C is switched on, the fan does not activate
- I found a loose 3-pin female connector near the fan area and another taped-up wire near the battery and headlight area
- I traced the fan wiring and suspect that the fan motor or control module is not connected properly
- It's possible the fan has been disconnected or cut in a previous repair attempt
My Current Theory
- The radiator fan not activating causes the engine oil to get hotter than it should
- Hotter oil = lower viscosity = lower oil pressure
- This might be what’s triggering the yellow oil light after extended driving, even though oil level and sensor are fine
I am a novice when it comes to cars, as this is my first car and want to look after it. Looking for help if anyone has had any similar problems.
(https://i.ibb.co/RTGGPLys/20250414-200202.jpg) (https://ibb.co/xqKKGVHB)
(https://i.ibb.co/6cZhMRL7/20250413-164226.jpg) (https://ibb.co/SDxTjXG4)
(https://i.ibb.co/5gb1vBYZ/20250413-164234.jpg) (https://ibb.co/0RHnZhB5)
(https://i.ibb.co/HDfXRBcm/20250413-181527.jpg) (https://ibb.co/WW4s7GrS)