Lambda sensor.
Lambda sensor.
this is what i found on the internet
P0125 Lexus - Insufficient Coolant Temperature for Closed Loop Fuel Control
Possible causes
- Low engine coolant level
- Leaking or stuck open thermostat
- Faulty Engine Coolant Temperature (ECT) sensor
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
also check this topic sounds like it could be the solution
http://www.outlawjapclub.co.uk/forum/sho...hp?t=10967