The oil pressure switch in a 1997 Camry is used to detect oil pressure loss and warn the driver if the pressure drops to an unsafe condition. The switch, unlike a transducer that provides early warning of oil pressure failure, does not show oil pressure that is slowly dropping. Instead, a dashboard warning light comes on only when the low pressure condition is present. This means, without the early-warning feature, that it is important to routinely check the engine oil level and periodically inspect the oil pressure switch for leaks.
Raise the hood of the Toyota Camry and locate the alternator at the front of the engine. The alternator is located on the left-front of the engine. Look directly down, and it is the first item that is nearest the front of the car that is driven by a belt. It is round, made of aluminum and has a heavy wire that goes directly to the battery attached to it's back housing.
Look to the left side of the alternator, both behind and to the rear, on the front of the engine. Located there is a small, round switch with a tapered end that is screwed into the engine block. Covering the switch is a black, protective cover with one wire attached to it. This is the oil pressure switch.
Unplug the plastic cover and inspect the switch for leaks around the body. Replace the switch if there is any indication of leakage.
