Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Lexus IS 250C Automatic TransFACTORY OEM SERVICE PROCEDURE
Monitor Strategy
| Related DTCs | P0125: Insufficient engine coolant temperature for closed loop fuel control |
| Required Sensors/Components (Main) | Engine coolant temperature sensor, thermostat, cooling system |
| Required Sensors/Components (Related) | - |
| Frequency of Operation | Once per driving cycle |
| Duration | 84 seconds: Engine coolant temperature at engine start is (closed-loop engine coolant temperature - 8.33°C [46.994°F]) or more 164 seconds: Engine coolant temperature at engine start is (closed-loop engine coolant temperature - 19.44°C [66.922°F]) or more, and less than (closed-loop engine coolant temperature - 8.33°C [46.994°F]) 1200 seconds: Engine coolant temperature at engine start is less than (closed-loop engine coolant temperature - 19.44°C [66.922°F]) |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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