Celica Liftback L4-107.5 1762cc 1.8L DOHC (7A-FE) (1995)
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The heating element is controlled by the ECM. When the sensor is cold the ECM grounds the circuit, causing the sensor to heat. The electric
heater allows the sensor to reach operating temperature much sooner than it could simply by using exhaust gas to heat it. The heater also prevents
sensor cool-down during periods of extended idling.
