P0420 code dodge journey

We recommend Torque Pro. When the engine is started cold, both O2 sensors should produce the same voltage. Once the engine warms up and more importantly, the catalytic converter, the upstream O2 sensor should switch above and below approximately 2.

So I got the P code. I have a 2. I've replaced both O2 sensors, new plugs, filter, cleaned the throttle body and almost every sensor in the car. Any ideas before I spend the money for a new cat? What kind of driving do you do and what other CEL codes have you had in the recent past with the J? If a lot of short drives are done , put a good dose of Seafoam fuel system cleaner in the fuel tank and DRIVE highway speeds for the tank over the course of a week and see what it does. The 2.

P0420 code dodge journey

OBD Code P is an extremely common indicator of an issue with the operating efficiency of your Dodge Journey's catalytic converter, so it's letting you know by flipping on the check engine light hopefully before you fail an emissions test. This code basically means that the engine's O2 sensors associated with your Dodge Journey's Catalytic Converter have informed the electronic control unit ECU that the catalytic converter isn't doing its job well enough or perhaps at all. If the catalytic converter isn't working like it should, your engine will let off more pollution than is legal — a P code almost assuredly means that you'll fail an annual emissions test, so you don't have much choice but to get this fixed if you want to drive legally. Note: If your vehicle has a dual exhaust system, this code will indicate that the issue is with the first engine bank, i. On dual-exhaust vehicles, you might see code PO instead, representing the second bank. On most vehicles, however — this code indicates a problem with either or both bank s. At this point, the front sensor should be registering varying levels of O2 in the exhaust while the back sensor should be reading fairly stable levels, because the converter "normalizes" the exhaust as it flows through the catalyst. You may experience a very slight reduction in engine power from reduced exhaust flow, as well. There's also the possiblity that you failed an solenoid-style emissions test from excess pollutants in the tailpipe or failed an OBD-based emissions test. Regardless, you need to get this one fixed, especially if your annual smog check deadline is coming up or is here. This is a potentially costly repair — catalytic converters contain valuable metals like platinum, which means that the part itself is expensive — as much as thousands of dollars depending on your vehicle. What's more, the labor involved can run into the four figures too. Replacing a catalytic converter can be difficult, especially on more recent models that have tried to make them harder to steal.

Engine: Engine.

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This page is meant to help you troubleshoot the Dodge Journey P trouble code. A failing oxygen sensor or bad catalytic converter are the most common causes of P Catalyst system efficiency is the percentage of these chemicals removed from the exhaust system. Oxygen sensors measure these pollutants. When the readings from the upstream and downstream oxygen sensors show similar readings not enough pollutants expelled from the exhaust , your vehicle will throw the service engine soon light P This can happen for three reasons:. You can ignore this section if your Journey has an inline engine or if the exhaust manifolds merge into one pipe before the catalytic converter.

P0420 code dodge journey

P is a well-recognized error code within the automotive industry, notorious for its persistence. Luckily, this article is designed to guide you through understanding the implications of this error code, exploring its possible causes, and navigating potential fixes. Drawing on our experience, we acknowledge that resolving P can be challenging without appropriate knowledge.

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If the catalytic converter isn't working like it should, your engine will let off more pollution than is legal — a P code almost assuredly means that you'll fail an annual emissions test, so you don't have much choice but to get this fixed if you want to drive legally. Miles: Miles. The 2. We like this selection of O2 sensors for catalytic converters. Also inspect the exhaust system for any cracks or openings between the upstream and downstream O2 sensors, They can throw some pretty weird codes if air can get in before the downstream sensor. This is our favorite choice for a universal replacement cat. It won't fix your issue, of course, but it'll temporarily "mute" them. Insert image from URL. Low cost aftermarket alternatives may need to be replaced before the end of their warranty. You can post now and register later. Misfires cause O2 voltage to stay low due to high oxygen content coming out of the cylinder. Followers 0. It's worth mentioning there's a few states that abide by CARB an emissions regulation — this won't get you past an emissions test in those states, so tread carefully. We recommend letting a pro install these, but if you're dead-set on doing it yourself, pick up a mid-range or high-end universal option instead of going the OEM route.

OBD Code P is an extremely common indicator of an issue with the operating efficiency of your Dodge Journey's catalytic converter, so it's letting you know by flipping on the check engine light hopefully before you fail an emissions test. This code basically means that the engine's O2 sensors associated with your Dodge Journey's Catalytic Converter have informed the electronic control unit ECU that the catalytic converter isn't doing its job well enough or perhaps at all.

It's worth mentioning there's a few states that abide by CARB an emissions regulation — this won't get you past an emissions test in those states, so tread carefully. This site uses Akismet to reduce spam. We recommend Torque Pro. What kind of driving do you do and what other CEL codes have you had in the recent past with the J? I'll give it a shot, thank you. Catalytic converters contain expensive rare-earth metals that make them expensive to produce. It won't fix your issue, of course, but it'll temporarily "mute" them. Skip to content. Sign In Sign Up. Replacing a catalytic converter can be difficult, especially on more recent models that have tried to make them harder to steal. If the voltage on the downstream O2 sensor mirrors the upstream O2 sensor, or the voltage varies too much, a fault code is stored. The downstream O2 sensor will be in the exhaust system after the catalytic converter. Join the conversation You can post now and register later. I have a 2.