mikecast Posted November 12 Report Share Posted November 12 code p0420 on dodge journey se 2014 2.4 L engine. what is the reason for the code. anyone?? Quote Link to comment Share on other sites More sharing options...
2late4u Posted November 12 Report Share Posted November 12 easy to google here is what I found,,,,,,,,,,,,Here are the most effective ways to fix a P0420 catalytic converter efficiency code: Clean the Catalytic Converter Try using a catalytic converter cleaner or fuel additive to remove carbon buildup that can affect the catalytic converter’s performance. Do a Proper Diagnosis Before replacing any parts, perform a thorough diagnosis to identify the exact cause of the P0420 code. You will find everything you need to know in this article Replace the Catalytic Converter If the diagnosis confirms the converter is worn out or clogged, replacement may be necessary. Replace the Front or Rear Oxygen Sensor (O2 Sensor) Faulty O2 sensors often cause incorrect readings, triggering the P0420 code. Repair Damaged Sensor Wiring Check and repair any broken, corroded, or shorted wires connected to the oxygen sensors. Replace Damaged Engine Sensors Faulty sensors such as the MAF (Mass Air Flow) or MAP (Manifold Absolute Pressure) sensor can cause incorrect fuel-air mixtures that lead to P0420. Fix High Oil Consumption Burning oil can contaminate the catalytic converter and reduce its efficiency. Repair Engine Misfires Misfires send unburned fuel into the exhaust, which can damage the catalytic converter. Correct Lean or Rich Fuel Mixtures An incorrect air-fuel ratio can cause incomplete combustion, leading to the P0420 error. Replace the Engine Control Unit (ECU) (Rare) In rare cases, a faulty ECU can misread sensor data, triggering a false P0420 code. jkeaton and larryl 2 Quote Link to comment Share on other sites More sharing options...
jkeaton Posted November 12 Report Share Posted November 12 https://www.google.com/search?q=code+p0420+on+dodge+journey+se+2014+2.4+L+engine.+what+is+the+reason+for+the+code.+anyone%3F%3F&rlz=1C1GCCA_enUS1162US1162&oq=code+p0420+on+dodge+journey+se+2014+2.4+L+engine.+++what+is+the+reason+for+the+code.++anyone%3F%3F&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCTM1MTRqMGoxNagCCLACAQ&sourceid=chrome&ie=UTF-8 Quote Link to comment Share on other sites More sharing options...
luzmina Posted November 16 Report Share Posted November 16 If after all test the problem remain the reason should be the catalytic efficiency is lower than 95%, you can try the P0420 eliminator with a small catalytic inside. P0420 eliminator Quote Link to comment Share on other sites More sharing options...
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