Skoda P0420 Catalyst System Efficiency Below Threshold Bank 1

Description

OBD-II Trouble Code Description for P0421 Skoda

Warm Up Catalyst Efficiency Below Threshold

What does this mean?

OBD2 Code P0421 Skoda definition:
Basically this means that the oxygen sensor downstream of the catalytic converter on bank 1 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 P0421 Skoda
You will likely not notice any drivability problems, although there may be symptoms. The code may be more likely to occur after the engine has had numerous cold starts in the past 1-2 days.

Causes

Possible causes of OBD code P0421 Skoda
A code P0421 Skoda 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 A sparkplug is fouled up

Possible Solutions

Measure the voltage at the oxygen sensor on Bank 1 (the rear sensor, or the sensor after the converter). 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 Skoda P0422 Skoda P0423 Skoda P0424 Skoda P0425 Skoda P0426 Skoda P0427 Skoda P0428 Skoda P0429 Skoda


The OBD2 Code Information Be Applicable For Skoda:

2013 Skoda Rapid,2013 Skoda Octavia,2013 Skoda Citigo,2011 Skoda Roomster,2011 Skoda Fabia,2010 Skoda Superb,2009 Skoda Superb,2009 Skoda Octavia,2008 Skoda Fabia,2007 Skoda Fabia,2006 Skoda Roomster,2006 Skoda Octavia,2005 Skoda Octavia,2005 Skoda Fabia,2003 Skoda Superb,2003 Skoda Octavia,2003 Skoda Fabia

 

Note:

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