Optima & Magentis (Canadian)

On 2.4L, knock sensor is located on left side of engine block. Disconnect 2 pin harness from sensor, measure resistance between terminals No. 1 and No. 2 component side. Resistance should be 4.38-5.36 k/ohms at 68°F (20°C). If resistance is not as specified, replace Knock sensor.

On 2.5L, there are 2 knock sensors, one on each side of block. Disconnect 3 pin harness from sensor, measure resistance between terminals No. 2 and No. 3 component side. Resistance should be 4.38-5.36 k/ohms at 68°F (20°C). If resistance is not as specified, replace Knock sensor.