Quote:
Originally Posted by Jgmabry
Drained the def fluid tonight when I got home and replaced with new. The poor quality def fluid message went off but the check engine light remained on. I let engine warm up to operating temp and shut it off. Waited a few minutes and started engine again and the check engine light remained on. I will do this again tomorrow for a couple more times to see if the engine light will eventually cycle off once the code becomes inactive.
I got the old def from work and it was probably old when I got it and it sat in my garage for probably 6 months before I used it. No telling how old it actually was. Lesson learned.
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On most vehicles if you don't have a code reader you can disconnect the engine batteries, then reconnect and the engine light will reset. If it is still another issue it will just come back on, but if it was the DEF issue all along it should not come back on.
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