1999 Jeep Grand Cherokee Logo
J
Joe Johnson Posted on Jan 16, 2016
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Whst is code PO340 - 1999 Jeep Grand Cherokee

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  • Jeep Master 20,706 Answers
  • Posted on Jan 17, 2016
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Bad news
those is the main /cam sensor
if fail hard, engine stalls, no spark
which engine, 4.0liters?
wrangle TJ
chapter 21 (dtc pages)
cam single dead or dropping out 1 to 10 times
it does give early warnings. (can)
check wires to it.
chapter 8d
free fsm TJ
http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service




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L Pfaff

L Pfaff

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  • Jeep Master 11,573 Answers
  • Posted on Jan 16, 2016
L Pfaff
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Hi

Ah! you posted P0304!

I assume the two bad wires were the problem?

Very best regards

Geordie
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