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I was able to get my local mechanic to get the code off of the CEL. It's firing P0306. He suggested that it could be the fuel injector 6 but the fact that it goes away after a restart of the engine seemed odd to him.
Possible causes
Faulty spark plug 6
Clogged or faulty fuel injector 6
Faulty ignition coil 6
Fuel injector 6 harness is open or shorted
Fuel injector 6 circuit poor electrical connection
Ignition coil 6 harness is open or shorted
Ignition coil 6 circuit poor electrical connection
Insufficient cylinder 6 compression
Incorrect fuel pressure
Intake air leak
You guys think I should just try to replace the spark plugs + ignition coil first? Searching the fuel injector replacement seems like they charge an arm and a leg for that kind of service (hopefully not needing to replace all 6).
Is there any other way to diagnose it further or is the best thing to bring it into the dealer to get them to narrow down the problem and at least give me an estimate first. I could decide at that point.
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