Toyota Corolla: Maintenance and care / Do-it-yourself maintenance

Emission inspection and maintenance (I/M) programs

Some states have vehicle emission inspection programs which include OBD (On Board Diagnostics) checks. The OBD system monitors the operation of the emission control system...

Do-it-yourself service precautions

If you perform maintenance by yourself, be sure to follow the correct procedure as given in these sections. Maintenance WARNING The engine compartment contains many mechanisms and fluids that may move suddenly, become hot, or become electrically energized...

Other information:

Toyota Corolla 2019-2026 Owners Manual: Wireless remote control/ electronic key battery

Replace the battery with a new one if it is depleted. As the key may be damaged if the following procedure is not performed properly, it is recommended that key battery replacement be performed by your Toyota dealer. ■ If the key battery is depleted The following symptoms may occur: The smart key system (if equipped) and wireless remote control will not function properly...

Toyota Corolla 2019-2026 Owners Manual: Using automatic mode

1 Press the automatic mode switch. 2 Adjust the temperature setting. 3 To stop the operation, press the off switch. If the fan speed setting or air flow modes are operated, the automatic mode indicator goes off. However, automatic mode for functions other than that operated is maintained...