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To replace the engine coolant temperature sensor on a 1998 Oldsmobile Achieva, first, ensure the engine is cool and disconnect the negative battery cable. Locate the sensor, which is typically found near the thermostat housing or cylinder head. Unplug the electrical connector, remove the old sensor using a socket or wrench, and install the new sensor after applying a small amount of thread sealant if required. Finally, reconnect the electrical connector and the battery cable, and check for leaks or any issues.

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3w ago

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