Why does the Hyundai’s coolant temperature sensor sometimes give wrong readings o r cause overheating?

Home > Gari Forums > Hyundai Forums > Hyundai Sonata Forums > Hyundai Sonata Sensor Issues Forums

Why does the Hyundai’s coolant temperature sensor sometimes give wrong readings o r cause overheating?

My Hyundai sometimes overheats, and I suspect the coolant temperature sensor isn’t working properly. What are common reasons for coolant temperature sensor failure in Pakistan’s hot climate?

Gari Specialist asked on 13 Jun 2025 15:15:15 pm

1 Answer

13 views |

Gari Master - on 13 Jun 2025 15:17:42 pm

The coolant temperature sensor measures engine temperature to regulate cooling fans and fuel injection. Failures cause overheating o r poor performance due to:

Sensor damage from heat stress in Pakistan’s hot climate.

Wiring corrosion o r short circuits from moisture and dust.

Coolant leaks o r low coolant levels affecting sensor operation.

Replacing the sensor and ensuring proper coolant levels usually solves the issue.