service engine soon light

new to BMW 323i, and first time joining group. had service engine soon light, come on and car was running not well at idle . went to autozone and borrowed code reader, error was #3 cylinder missing, c
hanged plugs, seems to be running much better but light is still on, on oth er cars I have had the service engine soon light could be cleared but I hav e not read anything about that in owners manual. does light reset automatically (maybe after some # of starts) ? does anybody have a e-copy of service manual?
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What year, what engine, what configuration?

That would likely be a thing you'd do with the service tool, if this is an OBD-II car. On the other hand, it might still be pitching new errors. If this is a model with a distributor, check the cap and rotor and. If it's a model with individual coils, check with a timing light. Then use the service tool (the autozone code reader _might_ work but might not, depends on the model of reader and year of the car).

You can get the service manual for a pretty reasonable fee on CD-ROM if it's one of the years that are available from the dealer on CD-ROM. If it's older than the CD-ROM sets, paper copies are plentiful. All depends on the year. --scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

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