Opel Corsa B 1993–2000 Service and Repair Manual: Oil pressure warning light switch/gauge sender - removal and refitting


1. The switch/gauge sender is screwed into the cylinder block or oil filter carrier (depending on model).

2. Disconnect the battery negative lead and disconnect the wiring from the switch/sender (see illustration).

Starting and charging systems
Oil pressure sender wires (arrowed)

3. Unscrew the switch/sender and recover the sealing washer. Be prepared for oil spillage, and if the switch is to be left removed from the engine for any length of time, plug the hole.


4. Examine the sealing washer for signs of damage or deterioration and if necessary renew.

5. Refit the switch/sender, complete with washer, and tighten it securely. Reconnect the wiring.

6. Check and, if necessary, top-up the engine oil.

Oil level sensor (16-valve models) - removal and refitting


1. Raise and support the front of the vehicle.

2. Disconnect the battery earth (negative) lead.

3. Drain the engine oil, saving it if it is fit for re-use.

4. Follow the sensor wiring back to its connection with the main wiring harness and disconnect it. (Early type sensors have a wiring plug secured with two screws, which can be disconnected at the sensor.)

5. Remove the four screws which secure the sensor to the sump. Remove the sensor and recover the seal.


6. Refitting is the reverse of the removal procedure. Use a new seal. Refill the engine with oil on completion.

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