Join Date: Dec 2007
Drives: 2001 Kia Optima, 1991 Cadillac Deville
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2001 Optima Crankshaft Angle Sensor
I just replaced one of those sensors on my 2001 Optima. I paid $120 for it at the local Kia dealership. Autozone has the identical sensor for $70. You can test it while it's still in the engine and connected. To do this, remove the pins from the sensor connector and insert them back into the socket connections of the main wire harness (see photos). With your meter set for DC, measure the voltage between the black and blue wires. With the crankshaft fin positioned in the sensor slot, you should read a logic high (5 VDC). When the fin is moved out of the slot the voltage should read about 0 VDC (logic low). If you measure the voltage while cranking the engine, you will see an average DC voltage of about 2.5 VDC if the sensor is working. Otherwise, the voltage will be a steady high or low.
I had to remove the power steering pump and mounting bracket to gain access to the cable route in order to replace the sensor. My sensor was physically damaged, which confirmed the steady state voltage from the sensor when the crankshaft was turned. I think the damage was caused when teeth falling from the timing belt got pushed through the sensor by the crankshaft fins.
Last edited by BioWayne; 12-16-2007 at 03:34 PM.
Reason: Content revisions and added photos