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P0125 on rx300. 1999 RX300. Myself, research only so far…

Customer Question
P0125 on rx300 Mechanic's...

P0125 on rx300

Mechanic's Assistant: What is the model/year of your Lexus?

1999 RX300

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

Myself, research only so far

Submitted: 7 months ago.Category: Lexus
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Answered in 54 minutes by:
9/29/2017
Lexus Mechanic: Toyota Service, Lexus and Toyota expert replied 7 months ago
Toyota Service
Toyota Service, Lexus and Toyota expert
Category: Lexus
Satisfied Customers: 5,211
Experience: 30 + years of experience; Multiple Award Winning Svc Mgr; Just Answer Customer's Choice Award Winner
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Hello. Welcome to Just Answer. Please allow me to assist you. The P0125 code usually equates to insufficient coolant temperature. This is most commonly caused by an engine cooling system thermostat that is staying open too long or opening too soon. In short, the engine is running too cool for maximum efficiency. More often than not, a cooling system thermostat replacement (with a genuine Lexus replacement unit) would be the recommendation to rectify this issue.

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Lexus Mechanic: Toyota Service, Lexus and Toyota expert replied 7 months ago

If you have any questions, please feel free to reply. Please do take a moment to confirm you have received my input

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