Man, looking for a break here, but Jeep threw up the P0301 code after I completed the oil cooler swap on 2014 JKU this week. I had followed others instructions to replace the drivers side plugs while in the engine and immediately thought that was the issue. I opened again and replaced new plugs with original plugs only to continue seeing CEL. I have a replacement fuel injector coming for cylinder 1 tomorrow, but thinking of turning to Jeep service if I cannot resolve. Any ideas about what could be the cause? Followed torque specs, tightening patterns, etc while rebuilding. I did have to touch the fuel rails, injectors and injector wiring during tear down and rebuild, but felt was careful and gentle with wires, etc and cleaned the injectors. Any ideas or suggestions?
Wrangler66
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46,870 Posts
Welcome to the Forum, from Cave Creek AZ.
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