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Q: Issue

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I have a 2008 Dodge Charger. When diagnostics is ran on it it says spark plugs need to be replaced. All 4 spark plugs have been replaced multiple times, at least 3 times in the last 6 months, the most recent being yesterday. The car continues to shake/jump when driven and has the check engine light on

My car has 160000 miles.
My car has an automatic transmission.

With the description that you have provided, it sounds like there is most likely a misfire condition. When you say that diagnostics have been run and they say that the spark plugs need to be replaced, I’m unsure on exactly what is telling you to replace the spark plugs, specifically. Most diagnostic trouble codes will generally elude to the fact that there is a misfire in a given cylinder, or a multiple cylinder random misfire. Now, with that said, there are several possible causes for a misfire. There could be a problem with a plug, but there could also be a problem with an ignition coil, plug wire, fuel injector, fuel pressure, or any number of other possible causes. It would be best to pull the diagnostic trouble codes first, and then begin diagnosing from there. If this is something that you feel you need a hand in identifying and/or repairing, contact a certified mechanic, like the mobile mechanics available at YourMechanic.com.

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