[awbazar]

On a 1993 Olds Cutlass Ciera S 3.3L V-6...
I saw a momentary "check engine light" illumination after bedding in the brakes on a second trip after the car sat in the driveway about 10 minutes. This happened as I was idling and waiting for a red light to turn and then the light went out and stayed out with no additional "check engine light" events. I have run the car several days since the event and never saw another light.

I jumpered the appropriate terminals on the DTC connector port and read a code 13 which may be Oxygen Sensor (O2S) Circuit (open circuit).

The only information which I have appeared to be for a 2.2 L car and this particular car is the 3.3L multiport fuel injected engine.

Can anyone tell me if a DTC 13 on the 3.3L motor is the Oxygen Sensor Circuit stated above? Since it only ever appeared once to my knowledge, I am not inclined to mess with it unless anyone can tell me otherwise.

[LATECH]

A code 13 is for the O 2 sensor .
I moved the thread also but with the undesired result of moving it to the wrong place. I meant to put it in the Modern engine electronics section, but I messed up. My apologies .
The code 13 is the same for both engines. It should be a single wire sensor also. An O2 sensor is considered a tune up Item like a spark plug. A new one would probably improve performance , especially if it has 100 k on it.
With the colder weather we have had lately the fuel mixture/ reblending that takes place across most of the country during seasonal changes may have played a part as the colder weather blends tend to have more alcohol in them.This can have an adverse affect on O2 sensors and cat health monitoring as well.

[awbazar]

Thank you for responding on the DTC 13. I suspected that the intermittent "check engine light" may have been a one time glitch but did not disconnect the battery to dump the code and see if it would appear again since I am scheduled for a NY state inspection. This vehicle is prior to OBDII diagnostics. On OBDII vehicles, dumping the codes will set "not ready" on some variables until sufficient warm up intervals have been logged. I didn't want to get turned away from the inspection on the basis of trying to cheat by dumping the codes beforehand.

Given that I pass inspection, since the light is not on and has never flashed again, I will proceed to dump the memory and see if it comes up again in the next week or so when I check the history. When I was bedding in the brakes I may have warmed the car up in a manner different from typical driving which previously never produced any check engine lights as far as I know.