Q: After i changed the crankshaft position sensor, i have a code p0302 which is a misfiring code.

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After i changed the crankshaft position sensor in yourmechaic.com, there is a code of p0302 (misfiring code) and low fuel efficiency (which used to have 28 highway, 24 city but now there is 24 highway 22.4 city). So, I fixed the misfiring at other mechanic shop by changing the ignition coil and spark plugs. But, after i drove a week after my car is still misfiring. And, when i fixed at the mechanic shop, they told me that if the misfiring is still continuing this might related to inappropriate crankshaft position sensor. So, I want to ask that is there a possibility that this misfiring is caused by inappropriate crankshaft position sensor? And, if it is can i get it replaced? Thank you.
My car has an automatic transmission.

The crankshaft and both camshaft position sensors should be replaced at the same time. Nissan had recalls on these sensors. Also, a simple compression test should be performed to verify no mechanical issues exist.

This car is known to have problems with the fuel injectors, this can be checked with a stethoscope to ensure they are clicking. Consider having a mechanic diagnose your car and replace your crankshaft and camshaft position sensors if necessary.

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