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Dan, ASE Certified Technician
Category: Toyota
Satisfied Customers: 1568
Experience:  Auto Technician
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My 99 Toyota Solara 3.0 has dtc's of P0125. R&R thermostat &

Customer Question

My 99 Toyota Solara 3.0 has dtc's of P0125. R&R thermostat & cts, & coolant, code comes back. Which 02 sensor sends ecu into closed loop?
JA: Which particular sensor are you asking about? And have any trouble codes been triggered?
Customer: Only code is P0125. Scan tool shows coolant not warm enough. Coolant temp on scan tool is 185 to 186 degrees. Shows open loop.
JA: Are you fixing your Solara yourself? What have you tried so far?
Customer: Yes I'm fixing veh. Replaced the thermostat , coolant temp sensor, coolant, & radiator cap. I'm a master auto tech, looking to find O2 sensor to put ECU into closed loop. Is air/fuel sensor responsible for closed loop function? Is that on bank1 sensor1 ?
JA: Anything else you want the mechanic to know before I connect you?
Customer: No but thank you for your help.
Submitted: 2 months ago.
Category: Toyota
Expert:  david craig replied 2 months ago.

Hi Im David, yes B1S1 always

Expert:  david craig replied 2 months ago.

do you need further assistance?

Expert:  david craig replied 2 months ago.

just checking in to see how its going

Expert:  Dan replied 2 months ago.

I am contacting you because the post has not been closed or rated.

This question will automatically close in 7 days.

You have not rated which tells me you are not happy or need more help.

Let me help some more. Is there anything else I can help you with?