Having problems with the wife's 2010 edge limited AWD. It says p0355 coil "e" primary/ secondary malfunction. I first, changed just the coil on cylinder E (5) middle front, and it ran decent with no MIL. 1200 miles later, same code. Changed plug as well, no difference.
Today, I just changed all coil packs and spark plugs, cleaned the throttle body and upper intake manifold thoroughly.
Same code.
I have a new PCM on the way (so they say) . I looked for vacuum leaks and couldn't see anything. Couldn't find loose connections either.
Anyone have any other suggestions as to what to test and or try? Thanks in advance!