P0420 code dodge journey

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.

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.

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.

Replacing a catalytic converter can be difficult, especially on more recent models that have tried to make them harder to steal.

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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

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. 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. This could be attributed to a malfunctioning catalyst or potentially be a false alarm triggered by a defective O2 sensor. The engine control module ECM uses two O2 sensors, one in front, and one behind the catalytic converter to measure its efficiency. If the catalyst system efficiency is low, the P code will be triggered. In most cases, a P trouble code is caused by a bad catalytic converter. The most common cause of the P code is a faulty catalytic converter.

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What's more, the labor involved can run into the four figures too. I'll give it a shot, thank you. 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. This code isn't particularly dangerous to drive with for a little while — we'd just strongly recommend that you reset the check engine light with an OBD scanner so if another mor urgent issue crops up, you'll know about it. The downstream O2 sensor voltage should begin to become more stable, less fluctuating. The 2. And it is the downstream sensor that is the primary trigger for the P code, Note these motors are also pretty finicky on OE brand sensors, Hope you used OE. You can post now and register later. 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. 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.

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.

These should be easy to spot, especially when the engine is running. I've replaced both O2 sensors, new plugs, filter, cleaned the throttle body and almost every sensor in the car. What kind of driving do you do and what other CEL codes have you had in the recent past with the J? So I got the P code. Share More sharing options Followers 0. Low cost aftermarket alternatives may need to be replaced before the end of their warranty. I'm partly dyslexic ,,,LOL;. Where is the P sensor located? Reply to this topic Start new topic. The 2. We recommend Torque Pro. 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. Learn how your comment data is processed.