Toyota Corolla (E120): Problem symptoms table

Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in order. If necessary, replace these parts.

Repair

    Share this page:

    Other materials:

    Audio & visual system
    Preparation Sst Recomended tools Equipment ...

    Automatic transmission / trans
    Preparation Sst Recomended tools Equipment Lubricant Ssm (special service materials) ...

    Circuit description
    The rear heated oxygen sensor is used to monitor oxygen concentration in the exhaust gas. For optimum catalytic converter operation, the air fuel mixture must be maintained near the ideal ”stoichiometric” ratio. The heated oxygen sensor output voltage changes suddenly in the vicinity of ...