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Low Oil Level Light


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My "Low Oil Level" light is on most of the time, yet the fluid level is where it should be. Can someone please tell me what conditions causes this light to come on/go off? Where is the sensor connection? Troubleshooting tips appreciated.<P>Thanks, Ray<BR>90 Convt

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<P> You can use the on board diagnostics to check the status of the level switch input. The level switches were redesigned, but are stll failure prone. <P> It is a good practice to check the operation of the switch when the pan is drained for oil change. However, they usually fail in the "low oil state".

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<BR> The sensor is mounted in the side of the oil pan. The "low oil" message does not directly coincide with the switch state. There is a routine the computer uses based on engine temperature to ensure the reading is taken after "drain back". This is why only the input in the diagnostics shows the true switch state.

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Those low oil senser do tend to go bad. It should be available from GM for a reasonable cost. There are tests and trouble charts in the service manual. If you not good with that just try a new sencer when changing the oil. <P>GM did have 2 bulitins (90-8-13 latest) reguarding this problem. <BR>The oil leval sencer was redesigned at the end of 1990. Part number 1649745 and seal 25531045. <P>Some oil pan were made misformed causing a intermitant low oil leval problem. A redesigned oil pan was installed on 3.8L's starting on 6/2/1990. The new pan requires replacing the gasket, pump screen, pump screen gasket, and dipstick. The pans were/are? available as a kit (part # 12350269) including the required replacement parts. The tec was paid 48 minuits to replace those parts. The kit was also intended to address oil leak problems in 89-90 Reattas.<P>Like someone elce said the sencer does not allways read current leval. I would not worry about the pan. Just something more to know about these cars. One other problem that was resolved by 1991. Too bad GM didn't have a few more years to fix the other Reatta Flaws.<P>Tom

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