Coolant Leak Diagnosis
Green, orange, or pink fluid leaking under a Subaru Outback when the engine runs hot indicates a coolant leak. This is a serious issue that can lead to engine overheating and damage if not addressed promptly.
Diagnosis Details
Possible Causes
Radiator or coolant hose failure due to heat and pressure
Water pump seal or gasket leak
Head gasket failure (especially if overheating is severe)
Related OBD-II Codes
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What You Should Do
Stop driving immediately to prevent engine damage.
Check coolant level and top off with the correct Subaru coolant if safe.
Inspect hoses, radiator, and water pump for visible leaks.
Have a professional mechanic perform a pressure test and inspect for head gasket issues.
Do not continue driving until the leak is repaired.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
