Lexus Troubleshooting Questions? Ask a Lexus Expert
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Are you saying you replaced the AFR sensor up at the exhaust manifold by the radiator?
That is the wrong sensor for this code. That is the sensor for bank 2 and sets a P1150 when it fails. The P1130 is the code for the Bank 1 AFR sensor and is in the manifold back by the firewall and has to be removed from under the car. :-( The P0125 is just a temperature relation code for the AFR sensor warm up time and not the thermostat. That is unless the engine is not getting anywhere near operating temp then in some rare cases it can affect this code and AFR sensor relationship.