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Trouble Code : 1-2-1 700 1991

posted by  Dave Stevens on  Sun Mar 14 10:50 CST 2004
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last visit: Sun Jan 1 02:36 CST 2012
[RELATED]

And check here for information on testing the MAP sensor. Use a large syringe or just suck on the tube to create vacuum for this test.

Sometimes it's just a poor electrical contact. This would be especially noticeable in wet weather as you noted. Clean the electrical contacts (spray contact cleaner, rubbing alcohol, even WD-40), plug and unplug several times, reset the diagnostic code and see if the problem returns before getting excited about replacing the sensor. It would be a very good idea to use dielectric grease on the contacts to protect from moisture and oxidation.



--
Dave -not to be confused with a real expert, just goofing around at this






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