Toyota Corolla Manuals

Toyota Corolla: Maintenance / Emission inspection and maintenance (I/M) programs

Toyota Corolla 2019-2026 Owners Manual / Maintenance and care / 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.

If the malfunction indicator lamp comes on

The OBD system determines that a problem exists somewhere in the emission control system. Your vehicle may not pass the I/M test and may need to be repaired. Contact your Toyota dealer to service the vehicle.

Your vehicle may not pass the I/M test in the following situations:

  • When the battery is disconnected or discharged

Readiness codes that are set during ordinary driving are erased. Also, depending on your driving habits, the readiness codes may not be completely set.

  • When the fuel tank cap is loose

The malfunction indicator lamp comes on indicating a temporary malfunction and your vehicle may not pass the I/M test.

When the malfunction indicator lamp still remains on after several driving trips

The error code in the OBD system will not be cleared unless the vehicle is driven 40 or more times.

If your vehicle does not pass the I/M test

Contact your Toyota dealer to prepare the vehicle for re-testing.

    General maintenance

    Listed below are the general maintenance items that should be performed at the intervals specified in the “Owner’s Warranty Information Booklet” or “Owner’s Manual Supplement/Scheduled Maintenance Guide”...

    Do-it-yourself maintenance

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    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. The operational ..

    Toyota Corolla 2019-2026 Owners Manual: Uniform Tire Quality Grading


    This information has been prepared in accordance with regulations issued by the National Highway Traffic Safety Administration of the U.S. Department of Transportation. It provides the purchasers and/or prospective purchasers of Toyota vehicles with information on uniform tire quality grading. Your Toyota dealer will help answer any questions you may have as you read this information. ■ DOT q..

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    Press the appropriate Home- Link® button. The HomeLink® indicator light should turn on.

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