OBD-II Trouble Code Description for P0431 Opel

Warm Up Catalyst Efficiency Below Threshold

What does this mean?

OBD2 Code P0431 Opel definition:
Basically this means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.

Symptoms

Possible sumptoms of OBD code P0431 Opel
You will likely not notice any drivability problems, although there may be symptoms such as a rough/hard idle when cold.

Causes

Possible causes of OBD code P0431 Opel
A code P0431 Opel may mean that one or more of the following has happened: The catalytic converter is no longer functioning properly An oxygen sensor is not reading (functioning) properly There is an exhaust leak

Possible Solutions

Inspect for exhaust leaks. Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen O2 sensor while you’re at it. One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it’s out of it’s bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It’s worth checking into.

Related Codes

P0420 Opel P0421 Opel P0422 Opel P0423 Opel P0424 Opel P0425 Opel P0426 Opel P0427 Opel P0428 Opel P0429 Opel P0430 Opel P0432 Opel P0433 Opel P0434 Opel P0435 Opel P0436 Opel P0437 Opel P0438 Opel P0439 Opel