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'91 740 CEL light on: Code 2-4-1

posted by  Rattlebone54 on  Fri Aug 17 11:31 CST 2018
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Hello to all! I humbly come before you again!
Here goes: Check engine light came on the second day I went from former sea level home to new residence at 6000 feet! I am unable to rest it, and will need the light to go off to pass smog here in new state. Can you help? I got code 2-4-1, 1991 740 178,000 miles! No outward signs of increased temp or decreased performance!






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