P0420 code dodge journey

So I got the P code.

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.

Misfires cause O2 voltage to stay low due to high oxygen content coming out of the cylinder. Help Us Help You Please p0420 code dodge journey below describing your issue as well as the specifics of your vehicle make, model, year, miles, and engine.

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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. This could be attributed to a malfunctioning catalyst or potentially be a false alarm triggered by a defective O2 sensor.

P0420 code dodge journey

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:.

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Replacing a catalytic converter can be difficult, especially on more recent models that have tried to make them harder to steal. The downstream O2 sensor will be in the exhaust system after the catalytic converter. The downstream O2 sensor voltage should not switch as fast. Regardless, you need to get this one fixed, especially if your annual smog check deadline is coming up or is here. If you have an account, sign in now to post with your account. 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. So I got the P code. 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 voltage on the downstream O2 sensor mirrors the upstream O2 sensor, or the voltage varies too much, a fault code is stored. Sign In Sign Up. Posted November 11, 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. 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. 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. 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.

Display as a link instead. 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 2. These should be easy to spot, especially when the engine is running. Upload or insert images from URL. This stable downstream O2 sensor voltage is due to the catalytic converter slowly releasing oxygen into the exhaust stream as it is being utilized. Typically, the causes for this code to set are: Most common: Failed Catalytic Converter Oxygen sensor — Downstream O2 sensor signal circuit voltage shorted to power or ground, failed O2 sensor Contributing Factors Fuel system components — including injectors and fuel quality Worn ignition system components, to include the coil, plug wires, spark plugs, etc. Always remember, check the engine for any type of misfire, as this will lead to premature catalytic converter failure. As always, we strive for accuracy, but do your own research — we're not responsible for how you use the information here. What's more, the labor involved can run into the four figures too. In all cases, high quality OEM approved catalytic converters are the best choice. The downstream O2 sensor voltage should not switch as fast. No other codes, not running bad, not doing anything other then the P code.