I have a 1989 Oldsmobile delta 88, 3.8 engine, and my "Service engine soon" light will come on and go off, and am getting codes 41 and 42, what does thses codes mean. help

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1984-85 Oldsmobile Delta 88 Stereo Wiring - The 12 Volt

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1984-85 Oldsmobile Delta 88 car stereo wire colors, functions, and locations.

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You have a OBD2 Set up. OBD1 won't read it. OBD1 stopped in 95.

Hello
When the service engine soon light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.

A/c compressor.

This could be caused by a faulty MAF sensor or an O2 sensor. Does the Check engine light come on when this happens?

Umm there is no engine idle screw on those type of vehicles.. If you are having problems with your idle then check the TPS(Throttle Position Sensor)sensor which is usually located on top of the intake..

You will need to get an OBD reading. to know exactly why the light came on. the light alone doesnt mean anything specific, hence the need for the OBD reading to understand why. Most mechanics will do this reading for free.

Well, in my 1989 Olds 88, the oil filter is just above the right swingarm for the wheel. It's an interesting reach from underneath, and the oil drips directly onto the frame of the car, but that's where the filter should be.

I believe they use the same 3800 (3.8L V6) engine up through 1997 or 1998...so you should be able to find it there. Hope that helps!

Caused damage to the Engine. You will need an Overhaul at this Point before it gets Worse and More Expensive.

The service engine soon light comes on for many reasons..it could be as simple as CO2 sensor, or it may just be one of the lights that just stays on, ask your local GM garagre to reset the code for you..maybe cost you a couple bucks.