P0420 code dodge journey

So I got the P code. I have a 2, p0420 code dodge journey. 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?

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.

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. The downstream O2 sensor voltage should begin to become more stable, less fluctuating. This stable downstream O2 sensor voltage is due to the catalytic converter slowly releasing oxygen into the exhaust stream as it is being utilized. The downstream O2 sensor voltage should not switch as fast. It will look as if it is stuck around one set voltage. If the voltage on the downstream O2 sensor mirrors the upstream O2 sensor, or the voltage varies too much, a fault code is stored. Always remember, check the engine for any type of misfire, as this will lead to premature catalytic converter failure. On OHV or Cam-in-Block engines, the Oxygen Sensor is screwed into the exhaust manifold that attaches to the head that has the number cylinder 1 in it. The downstream O2 sensor will be in the exhaust system after the catalytic converter. Last possibility. Specific to Chrysler products, these are the more common issues with the Catalyst System Efficiency Below Threshold Bank 1 fault code:. In all cases, high quality OEM approved catalytic converters are the best choice. Low cost aftermarket alternatives may need to be replaced before the end of their warranty.

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.

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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. This complexity arises as the error can take a significant amount of time to reappear, even after parts replacement and code resetting. Throughout this blog post, we will address these issues and more, providing you with comprehensive insight into the P code.

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.

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If the voltage on the downstream O2 sensor mirrors the upstream O2 sensor, or the voltage varies too much, a fault code is stored. Once the engine warms up and more importantly, the catalytic converter, the upstream O2 sensor should switch above and below approximately 2. This stable downstream O2 sensor voltage is due to the catalytic converter slowly releasing oxygen into the exhaust stream as it is being utilized. The reason you can make this determination is that a functional catalytic converter will lower the temperature of the exhaust by a substantial degree in the course of normal operation. 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 won't fix your issue, of course, but it'll temporarily "mute" them. So I got the P code. The downstream O2 sensor will be in the exhaust system after the catalytic converter. These should be easy to spot, especially when the engine is running. 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. The O2 sensors are bosch. I'm partly dyslexic ,,,LOL;. This site uses Akismet to reduce spam. No luck? Help Us Help You Please comment below describing your issue as well as the specifics of your vehicle make, model, year, miles, and engine.

This page is meant to help you troubleshoot the Dodge Journey P trouble code.

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. No luck? What's more, the labor involved can run into the four figures too. When the engine is started cold, both O2 sensors should produce the same voltage. They tend to be affordable — just pick one up from Amazon or an auto parts store. It will look as if it is stuck around one set voltage. Learn how your comment data is processed. If the voltage on the downstream O2 sensor mirrors the upstream O2 sensor, or the voltage varies too much, a fault code is stored. Share More sharing options This stable downstream O2 sensor voltage is due to the catalytic converter slowly releasing oxygen into the exhaust stream as it is being utilized. The downstream O2 sensor voltage should begin to become more stable, less fluctuating. Note: Your post will require moderator approval before it will be visible. Misfires allows the unburned fuel and air to escape to the exhaust system. Join the conversation You can post now and register later. 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.