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How do you replace an engine coolant temperature sensor on a 1994 Saturn SL 1?

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2015-07-15 19:34:22
2015-07-15 19:34:22

On the SL2 (DOHC), there are two coolant temperature sensors located on the left-hand side of the cylinder head, near the upper coolant hose.

Your SL1 (SOHC) might be different.

On the SL2, the upper sensor with ONE WIRE controls the temperature gauge in the dash. The lower sensor with TWO wires provides input to the computer. They are not interchangeable. Yours may be similar.

Here is a tip you will need a 4mm deepwell socket to get it out.

Actually, you will need a 14mm deep socket or box wrench. The new sensor may require a 13mm socket or wrench, depending on the manufacturer.

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