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Gary
Gary, ASE Certified Technician
Category: Subaru
Satisfied Customers: 921
Experience:  Senior Technician
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Subaru Legacy GT Spec.: why when I put the key in the on position

Customer Question

why when I put the key in the on position my tem p gauge goes all the way up to hot?
Submitted: 2 years ago.
Category: Subaru
Customer: replied 2 years ago.
hi can some please answer my question?
Expert:  Gary replied 2 years ago.
Hi there,
If your gauge goes full scale hot even with a cold engine, the coolant temp sensor is probably grounded in the wiring. You need a scan tool to look at engine data for coolant temp.
Can you access a scan tool?
Gary