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Hi, All. Sorry for the duplicate post.


I just picked up a 1988Olds Delta 88 w/64000 miles from my Mom. This is truely acar driven by a little old lady.


Yesterday, I drove it from Chicago to Minneapolis,
439 miles door to door. The engine sounds great, but
I was getting an occasional "SES" light during the trip.
Also, I felt a thump a couple times when the light came on.


I just pulled the codes this morning using the paper clip method. (These old cars are kinda neat).

13 Oxygen sensor Circuit


Check for a sticking or misadjusted throttle position sensor. Check the wiring and connectors from the oxygen sensor. Replace the oxygen sensor.


41 EST circuit


No distributor reference pulses to the ECM at specified engine vacuum



There was no recommended action for the code 41, not sure what to do?
Also, can anyone tell me how many O2 sensors I have? I don't own a manual. From what I found online and a not-so-sure auto clerk is I only have one. I took a look and I can see one on top, near fire wall side.


I will go ahead and replace the O2 sensor. I'm not sure where to start with the code 41? Any direction would be appreciated.


thanks much.


jasper
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