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Old 06-12-2019, 06:27 AM   #213
hui202
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Quote:
Originally Posted by RZNT4R View Post
420 is catalyst efficiency, so I'm going to assume it's a catless UEL.

That's what's causing your check engine. No cat = automatic 420, and the detection threshold for 219/119 is so sensitive the UEL is setting it off.
I have a UEL installed and getting 219/119. Do you know a solution to this?
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