Description
OBD-II Trouble Code Description for P0421 Seat
Warm Up Catalyst Efficiency Below Threshold
What does this mean?
OBD2 Code P0421 Seat 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 Seat
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 Seat
A code P0421 Seat 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.
The OBD2 Code Information Be Applicable For Seat:
2013 Seat Mii,2013 Seat Leon,2013 Seat Ibiza Cupra,2013 Seat Ibiza,2012 Seat Toledo Concept,2012 Seat Exeo ST,2012 Seat Exeo,2012 Seat Alhambra 4WD,2011 Seat Ibiza,2010 Seat Ibiza,2009 Seat Leon,2009 Seat Ibiza,2009 Seat Altea,2007 Seat Altea,2006 Seat Leon,2006 Seat Ibiza,2005 Seat Toledo,2005 Seat Altea,2004 Seat Ibiza,2004 Seat Cordoba,2002 Seat Ibiza
Note:
1. The list of automotive Makes at the right edge of the screen. The currently selected ODB-ii codes is for the Seat makes.
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