What are the symptoms of a faulty water temperature sensor?
2 Answers
Phenomena caused by a faulty car water temperature sensor: 1. Some vehicles cannot accelerate, even when the accelerator pedal is pressed hard, the engine struggles to speed up. 2. Some only have a constant warning light or an accompanying alarm sound, but the vehicle can still operate normally. Below is relevant information about the water temperature sensor: 1. Principle: The electronic control unit measures the temperature of the engine coolant based on this change. The lower the temperature, the greater the resistance; conversely, the smaller the resistance. It can determine the current operating state of the car, whether it is stopped or moving, or how long it has been running. 2. Structure: The car water temperature sensor is installed in the water jacket of the engine block or cylinder head, in direct contact with the coolant, to measure the temperature of the engine's coolant.
A faulty coolant temperature sensor shows obvious symptoms. First, while driving, the temperature gauge on the dashboard will give false readings, such as constantly showing low temperature or maxing out to the red line. This is no small matter because the engine might actually be overheating, but the fan either doesn't work or runs continuously due to incorrect signals. Even worse, starting the engine becomes problematic, especially in cold weather, with difficulty igniting because the computer can't determine how much fuel to inject. Fuel consumption will skyrocket, emissions will exceed standards, and prolonged operation can cause internal engine components to burn out, leading to expensive repairs. I've fixed many cars where owners waited too long, turning a small sensor replacement costing a few dozen dollars into a major engine overhaul costing thousands. If you notice these signs, get it checked immediately—don't compromise safety.
