Well, I finally decided to replace the Oil Pressure Sending Unit as I was getting tired of the light being on during my commute and it had started to get much worse this week (was staying on up to 1500+ RPM once the engine warmed up).
There are several threads on the subject of the somewhat infamous Oil Pressure Sensor or Sending Unit. Most of them focus on the 1st Gen versions, but not too much has been detailed on the 2nd Gen. So here it is...(Please forgive my somewhat oily working area...I still have an oil leak to deal with on the oil pan)
Short 3/8" socket extension
Channel lock pliers (or adjustable wrench bigger than 19mm)
Some flexibility to reach the location - sheesh
Remove passenger side front tire (Not necessary, but might add some working room)
Jack up the passenger side of the car and put the car on jack stands
Remove the forward inner liner behind the passenger side front tire for access.
Steps (Refer to this gallery
1. Locate the Oil Pressure Sending Unit Cover which is above and to the left of the Oil Filter when looking at the engine from below and behind.
See photo - [ img ]
2. Remove the Oil Pressure Sending Unit Cover by removing three bolts using the ratchet and 15mm socket. (Use the extension as required)
See photo - [ img ]
3. Disconnect the electrical connector from the Oil Pressure Sending Unit by sliding the yellow tab to the side and then press the connector locking tab to release it.
4. Remove the Oil Pressure Sending Unit using the Channel locks (have a rag available as this will allow some oil to drip once the unit is removed)
You should now have these parts removed - [ img ]
5. Carefully install the new sensor making sure to not overtighten (ensure the sensor threads have thread sealant or lock-tight on them)
It should look like this photo when done - [ img ]
6. Re-attach the electrical connector after cleaning off any oil on the contacts. (Very important to clean the mating contacts)
Should look like this when done - [ img ]
7. Re-attach Oil Pressure Sending Unit Cover using the three bolts previously removed in step 2.
8. Re-install the forward inner liner which was removed in the prep steps and re-install the tire if removed
9. Lower the car from the jack
10. Test drive long enough to get engine warm to verify problem is repaired. :wink:
This is what the old sensor looked like - [ img ]
I hope this helps some of the other owners of early 2nd Gens that are starting to experience this problem. By the way, we have the exact same sensor as the 1st Gens, so it isn't a matter of if, but when it will happen to us. :roll:
Note: Restored links to photos 06-06-2008.