Q: My car has two error codes

asked by on

I have two error codes. The first code is P0401, insufficient EGR flow detected. The second is P0401, warm up catalyst efficiency low, bank 2. What would it take to have these fixed?

Getting a hold of the OBD codes is definitely a great first step to diagnosing your Mitsubishi, but it must be noted that OBD codes are only a starting point, not a diagnosis. The codes P0401 and P0431 are actually two separate concerns going on with your Galant.

First, we will start with the code P0401, which represents insufficient EGR flow. There are a few different reasons that can cause this code to pop up. This includes lack of vacuum to activate the EGR valve, the EGR valve itself has failed, or there is a blockage in the EGR system preventing flow.

Now in regards to your second code, P0431, this represents a Warm Up Catalyst Efficiency Below Threshold signal. With this code, it is possible that the catalytic converter is no longer functioning efficiently and you may have an exhaust leak. There is also the chance that the oxygen sensor that monitors the catalytic converter is failing.

As you can see, there is a long list of possibilities that could be causing your Galant to give these codes. To be 100% certain, it may be time to enlist the assistance of a certified mechanic. They will be able to comprehensively inspect your vehicle and determine exactly why these codes are in your computer as well as assist you in making the necessary repairs to keep your vehicle running at its best.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My car has two error codes

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Gearshift button

Hello. In order to repair this problem, you simply need to get the gearshift knob and button replaced. If you still want to use the car until you are able to get your shifter fixed, you can take a small...

Q: i have been noticing increasing poor acceleration performance & bad gas mileage and now my check engine light is on

If the Check Engine Light is on then you would need to have the computer checked to see if the code received pertains to the problems you are having. Not getting the valves adjusted may start to cause misfire codes....

Q: I need to replace my catalytic converter and I wanted to see what are the main parts I will need to buy that comes with it?

The parts required to change out a catalytic convertor will really depend on what type of converter is going to be used. There are factory type replacements that will use a flange and just get bolted into place, that will...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.