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Dodge Journey OBD2 Code Diagnosis P0430

 

This page will help you solve the problems of Dodge Journey Fault Code P0430. On the Journey, this code is usually caused by an imperfect oxygen sensor, but there can be other causes as well. We will see them below. P0430 technically means:

One of the most common fault codes on each and every Dodge vehicle is P0430. This code refers to a number that is given to you when you connect your Dodge Journey to an OBD2 scanner. No matter what model you have, this OBDII code (1996 and newer models) has exactly the same meaning for all of them.

Dodge Journey P0430 OBDII Code Defined

Your Journey has at least 2 oxygen sensors, one before and one after the catalyst. Among the many functions that oxygen sensors have is to measure emissions scenarios before and after exhaust gases enter the converter. P0430 means that the oxygen sensor downstream of the catalyst registers an erroneous reading.

P0430 Dodge Journey

The upstream and downstream oxygen sensors should show different readings. The computer wants to see that the catalyst has refined the exhaust gases. If the readings from the upstream and downstream oxygen sensors show similar readings, it means that these exhaust gases are not being cleaned and the vehicle will display the service engine soon light (P0430).

See also: P0420 Dodge Journey

Dodge Journey Code P0430 Symptoms

Dodge Journey P0430 Symptoms

There are usually no driving problems associated with P0430. For most people, the first sign that something is wrong is the check engine light coming on.

These are the typical symptoms that something is wrong when you have the P0430 code. Often, when the problem is only the oxygen sensor, you will not feel any symptoms.

  • Mileage- It may or may not occur depending on whether the catalyst is clogged or not.
  • Power loss– It is a really strange feeling to drive a vehicle with a catalytic converter that is going out. Typically, the engine runs well at idle and with a light load. When the engine is put under heavy load, it feels like it is running out of gas. It is very similar to the symptoms of a bad fuel filter.
  • service engine light– This is often the only symptom of Dodge Journey Code P0430.

Related: P0442 Dodge Journey

Root Causes of P0430 on Dodge Journey

OBD2 code P0430 Dodge Journey

There are many things that can cause the P0430 fault code on your Journey. Here are the most common ones.

  • Oxygen sensor– The P0430 code is thrown when the oxygen sensors on both sides of the exhaust have very similar readings. When the oxygen sensor is bad, it can cause a false reading and trigger the code. If the engine does not show any of the performance decreases associated with a bad catalytic converter, it may very well be the oxygen sensor (if you haven’t already felt the loss of performance).
  • Catalyst– The catalyst is responsible for eliminating the greatest possible amount of pollution from the vehicle’s exhaust pipe. Over time, they can become clogged. Although modern catalytic converters are supposed to last the life of most cars, there may be an underlying problem if it has become clogged. Here’s how to diagnose a bad catalyst from Advanced Auto Parts.
  • O2 sensor Cabling– Over time, the oxygen sensor wiring may become damaged. It is especially volatile, since it is right next to the hot exhaust at all times. The downstream oxygen sensor wiring is especially volatile since it is so far from the ECM (much further distance to travel.
  • Timing– If your Journey has a misfire or the exhaust gas timing is off, this can affect the gases going to the O2 sensors enough for the P0430 code to be logged.
  • Exhaust Drain– If there is a noticeable exhaust leak coming from the vehicle, it may change what the O2 sensors register enough to throw the P0430 code.
  • Engine temperature sensor– If the computer does not know what the engine temperature is, it will keep the fuel mixture rich. When the fuel mixture is rich, the exhaust seen by the O2 sensors will be out of range and could trigger P0430.

Dodge Journey Code P0430 Possible Resolutions

Often the oxygen sensor is the cause of P0430. Specifically, it is usually the O2 sensor or sensors located on the downstream side of the catalyst.

But don’t be surprised if it doesn’t happen this way. It would be a great idea to check the exhaust for leaks first. You should be able to easily hear an exhaust leak under the vehicle.

Unless you have an exhaust leak, you’ll probably need to check the O2 sensors and/or catalysts. Here are a few good guides to help you do it.

Good luck finding out the cause of P0430 in your Dodge Journey. If there is any inaccuracy, or something that you think could improve the article, do not hesitate to comment or send it by message. Thank you.

 

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