Thread: P0340 code
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Old 11-15-2017, 12:45 PM   #3
Jon Boy
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Join Date: Jul 2007
Location: Utah
Posts: 177

2001 SC2
Default Re: P0340 code

I guess I spoke too soon. It's misfiring on 1 and 4 and giving me a P0340 code again this morning. I swapped the coil pack again, along with the ICM, and it's still misfiring on 1 and 4.

Does anyone know what could cause an ignition misfire on cylinders 1 and 4 even when the coil pack and ICM have been replaced?

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