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p1391 error code

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Old Jun 6, 2017 | 09:38 PM
  #1  
lisaap's Avatar
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Model: Cherokee
Default p1391 error code

I have a 98 grand Cherokee jeep 4.0 349500 miles I have replace the crank and cank sensor but I continue to get this code my rpm keep jumping up and down what I am I missing
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Old Jun 7, 2017 | 12:15 AM
  #2  
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From: Lake Ozark, Missouri
Year: 1992
Model: Cherokee
Engine: 4.0L
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I believe there is a resynch procedure after you replace the sensor. P1391 is a loss of signal code and could be a wiring issue.
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