uriel70271 Posted September 20, 2023 Report Share Posted September 20, 2023 Hello, good afternoon, I have a Jouney 2015 V 3.6. The code P0301 came out. The mechanic changed the spark plugs. And the code came out again , and he change the ignition coil And again come out , I wanted to ask you what it could be the mecanic doesn't answer me anymore Thank you Quote Link to comment Share on other sites More sharing options...
jkeaton Posted September 20, 2023 Report Share Posted September 20, 2023 (edited) Sounds like you need another mechanic who knows how to perform diagnostics.....many factors can cause this code. You've addressed a few of them (plug and coil), a competent mechanic will need to check other causes: Faulty spark plug in cylinder 1 (DONE) No compression in cylinder 1 Damage or excessive wear of spark plug wires and/or coils (DONE) Faulty fuel injector Clogged EGR valves or tubes Burned valves Inaccurate ignition timing Vacuum leaks Low fuel (rare) Leaking from head gasket Cracked distributor cap Faulty camshaft sensor Faulty crankshaft sensor Faulty mass air flow sensor Faulty oxygen sensor Faulty throttle position sensor Faulty catalytic converter Faulty powertrain control module Edited September 20, 2023 by jkeaton 2late4u 1 Quote Link to comment Share on other sites More sharing options...
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