|Trouble Code||Fault Location||Probable Cause|
|P0423||Heated catalytic converter, bank 1 -efficiency below threshold||Catalytic converter, wiring, HO2S 2|
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BAT Team Discussions for P0423
- 2003 VW Passat 2.8L V-6
OK, time to get back to this one. I don't feel I am in "over my head", but I admit I am in "deep'... so only stick with this if you are patient or really want to go on this journey of learning about the Passat. There are only two real (consistent) symptoms right now. The P0421 code keeps returnin...
- F-150 Ecoboost Misfire on Acceleration in Humid Conditions
[color=red]I wonder if they have any way of checking the cat besides codes?[/color] There are a few ways to check for a catalytic convertor failure that does not require a scan tool. One of the easier ones is just to look at it. If you see a discoloration, bluish in nature, that cat has had a spike...