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View Full Version : Check Engine Light is on! HELP ek spec e36 10-21-2007, 05:41 AM On my 1992 E36 street & Track, the stupid check engine light came on with code 1221 (O2 sensor). Well, I just replaced the o2 sensor about 9 months ago, what else could be wrong? I have the CAI and Jim Comforti chip. Does it mean my car is running too rich? any though! If I ignore the problem and track it, would it cause damage to the engine? ek spec e36 10-21-2007, 04:57 PM Anyone have the same issue? JClark 10-21-2007, 05:38 PM How does it run? Big vac leak can do that. ek spec e36 10-21-2007, 05:52 PM My car is running okay, just not as strong as before Big vac leak, how should I check it? Michael9218 10-21-2007, 08:54 PM Unfortunately, the easiest way is to take it to a shop and have them do a leak test. With the right tools, it's easy enough...but ain't that always the case? ek spec e36 10-21-2007, 09:05 PM once again, If I ignore the problem and track it, do you guys think it would cause damage to the engine? |