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.

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.

If you have an account, sign in now to post with your account.

.

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:.

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.

Papa s to go

On dual-exhaust vehicles, you might see code PO instead, representing the second bank. I'm partly dyslexic ,,,LOL;. 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? Learn how your comment data is processed. Replacing a catalytic converter can be difficult, especially on more recent models that have tried to make them harder to steal. Note: If your vehicle has a dual exhaust system, this code will indicate that the issue is with the first engine bank, i. No other codes, not running bad, not doing anything other then the P code. 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. When the engine is started cold, both O2 sensors should produce the same voltage. Paste as plain text instead. Link to comment Share on other sites More sharing options What's more, the labor involved can run into the four figures too.

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.

Note: If your vehicle has a dual exhaust system, this code will indicate that the issue is with the first engine bank, i. This stable downstream O2 sensor voltage is due to the catalytic converter slowly releasing oxygen into the exhaust stream as it is being utilized. Reply to this topic These should be easy to spot, especially when the engine is running. This is our favorite choice for a universal replacement cat. Skip to content. Learn how your comment data is processed. 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. Notify of. Misfires cause O2 voltage to stay low due to high oxygen content coming out of the cylinder. Catalytic converters contain expensive rare-earth metals that make them expensive to produce. On most vehicles, however — this code indicates a problem with either or both bank s.