How to troubleshoot the P0118 fault code?

[DiJack]

p0118 fault code troubleshooting steps are as follows: 1. Identify the cause of the fault: (1) Check if the coolant level is sufficient. (2) Verify if the thermostat, water pump, and cooling fan in the cooling system are functioning properly and if the coolant is circulating. (3) Inspect the coolant temperature sensor and its surrounding circuits for any short circuits, open circuits, or poor contact. (4) Check for ECU faults. 2. Solutions: (1). If this fault code appears, first check if the coolant level is sufficient and replenish it if necessary. If unsure or if other faults are present, seek assistance from a professional technician. (2) Regularly check the coolant level and replace the engine coolant on schedule. The general replacement interval is 2 years or 40,000 kilometers, but the specific interval should follow the manufacturer's guidelines for each vehicle model.