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All "p" codes have four numbers in them. P340 doesn't mean anything. Should be Pxxx

I think the answer you are looking for is 0340 and it means that you need a new camshaft sensor, crank sensor, or timing is off on your car. The entire circuit for these sensors sends off this code, so it could also be a plug for one of these sensors. Good luck. Remember if the sensors don't fix it than they are doing their job and your cam is out of time.

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Q: What does check engine code p340 mean on 2003 dodge neon?
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