I suspect the Lambda counter is not a precision part. 1% error applied to 30,000 miles is 300 miles. I suspect it is not a precision part. For all we know, it could have a 5% error or more.
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I was kinda thinking the same thing, currently at 30,040 and still no light. I'm not worried about it, I was thinking of unplugging it anyway when it did come on. O2 sensor was replaced last year. I was just thinking it would be neat to see and to know that it is/was working.
What does the counter on the lambda unit itself read?
Here is how to reset: http://support.delorean.com/kb/a51/lambda-light.aspx
Replace brake light switch....what a pain on my 72 year old bod....
Could a lack of the light coming on also mean that the car actually has 130,000 miles instead of 30,000? As in the light would have come on at 30K, 60K, 90K, 120K, etc? I was wondering about this a while ago since I'm at 26K miles but have no idea if it's rolled over in the past or not due to lack of records....