Question about 2007 Mitsubishi Outlander XLS

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Computer code 431 - 2007 Mitsubishi Outlander XLS

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P0431 Warm Up Catalyst Efficiency Below Threshold (Bank 2)
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Posted on Dec 12, 2012

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Posted on Jan 02, 2017

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I have a 2008 pt cruiser and I have 3 codes pop up they are. Sw ver 200. And cam over 431. Lin very. 429. What do they mean??


Those aren't error codes. To check error codes do this:
1. Place the key into the ignition.

2. Turn the key towards the windshield (without starting the engine) and back again.

3. Do the above 3 times and with the last turn the key left pointing forward (towards the windshield).

4. All three turns should be made within 5 seconds. (it's not hard).

If you did it right, in the middle dial where the odometer is, the fault codes stored in the computer will come up. Example: P0138

If there's no codes stored in the computer, it should read "done".

Mar 22, 2015 | Cars & Trucks

1 Answer

Po 431


according to my date sheet Code P0 431 indicates that the Warm up catalytic converter, bank 2 - efficiency below threshold - probable cause - Catalytic converter, wiring, HO2S 2. but as you haven't stated which engine I can only give you what it states, it should be the same anyway.

Jun 10, 2014 | 2005 Kia Sedona

1 Answer

P0431


Well code 431 means the computer does not think the catalytic converter is working correctly. The engine computer uses data from the O2 sensors to monitor the cat.
The actual problem could be the cat, one of the O2 sensors, a fuel problem, or other things. The O2 sensors would need to be watched with a scanner to find the issue.

Jul 17, 2013 | 2002 Mitsubishi Diamante

1 Answer

Engine code PO431 on 2003 Mazda 6 meaning? Problem? Easy fix?


It depends on the actual problem.
Code 431 means the catalytic converter is not performing as expected. The computer uses data from the O2 sensors to monitor cat performance.
One of the sensors may be going bad, or the cat may be failing. You would need to monitor the O2 sensor readings with a scanner and watch the temp of the cat to try to assess the problem.

Jul 15, 2013 | Cars & Trucks

1 Answer

Code came up: P0431


Well the code is not for what you described.
Code 431 is the O2 sensors telling the computer the catalytic converter is not working correctly.
Have you checked the radiator and is the cooling fan working ?
Is the thermostat opening at 195 degrees ?

Jan 21, 2013 | Mitsubishi Cars & Trucks

1 Answer

How to fix 2004 Kia Sedona with codes p0421 and p0431 I need help with these codes van will not pass inspection and thank you with any help in advance


The code 421 is a problem with the catalytic converter or O2 sensors on bank one. Under normal conditions the front and rear sensors should be giving different readings back to the computer and they are more or less the same.
Code 431 is the same thing for bank two.
Unless you find a big exhaust leak, I doubt this is something you can fix yourself. You would need a scanner to watch the readings coming from the O2 sensors and the engine temp among other things to be able to determine the cause or causes.

Jan 04, 2013 | Cars & Trucks

1 Answer

Service Engine light code 431


Here is the definition for code 431.

P0431 MITSUBISHI Description The Engine Control Module (ECM) monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor).

A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.

When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst malfunction is diagnosed. The problem could be the catalytic converter, one of the O2 sensors, or an air leak in the exhaust system.

Read more: http://engine-codes.com/p0431_mitsubishi.html#ixzz2EnHWZTpR

Dec 11, 2012 | 2007 Mitsubishi Outlander XLS

1 Answer

Kia p0431, p0446, p0715


They are three separate issues.
Code 431 involves the O2 sensors and the catalytic converter, code 446 is for the evap vent control for the gas tank, and code 715 is for the input shaft speed sensor in the transaxle.
The engine temp and other factors would need to be checked for code 431, and the sensors would need to be tested for the other two codes.

Aug 11, 2012 | 2002 Kia Sedona

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