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Coolant Sensors Differ in Temperature

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Old Jan 30, 2025 | 10:42 AM
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Default Coolant Sensors Differ in Temperature

Hey guys! Long time watcher, first time poster. I recently did a PCV change, and refilled coolant. I bled the SC, but have not bled the heater cores. After bleeding the SC a couple of times, temps were good and staying below 210 degrees.
I was driving into town today, and noticed I forgot to check both sensors when looking at my coolant temps prior. I pulled up the sensors to check temps, and one was at 200 degrees, the other at 215-230 degrees. My assumption would be to bleed the heater cores, but just wanted some second opinions.

If I bleed the SC, is it not ran on the same loop as the heater cores? If it is, why bleed both and not just the SC.
Why are the sensors displaying 2 different temps? Is one an inlet, and the other outlet?



Thanks for dealing with my ignorance, I love learning about these cars
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