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Hello I have a 2007 Magnum 2.7L that has code p0302 cylinder#2 misfire seems to have coolant loss but can find no leaks. Recently had another code p0300, so both are active check engine light started flashing but stop and stayed solid. Not driving it. Replaced spark plugs should I replace coils? Any feedback please.
actually a pretty easy fix. The pass key computer lost its programming. Put the key in and leave it on with the security light flashing. Just turn off all your accessories and make sure battery is pretty good charge. Anyway after you leave the key on for ten minutes the security light will come on steady so turn key off and right back on and start car. If security light still starts blinking and car stalls then do it again. It will usually work the first time but can take a few times to get it right.
I would have the voltage regulator tested. It is on the altenator. Most part stores will test it for free in or out of the vehicle. When this wears out, voltage fluctuates in the system and does not stay steady.
sounds like the security system is malfunctioning. When you turn the key on does the security light stay on steady or flash? If flashing leave the key on for about fifteen minutes till it stays on steady. the engine should then start. if it does not go steady, likely you need to replace the ignition key switch assembly.