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MonkeyBusiness M Just got a B0423 code: air mix door number 2 inoperative error. No idea what this could be, and it seems that I cant search this new forum setup, or I havent figured out how to yet. Any help or suggestions would be appreciated. #1 · May 7, 2010 Just got a B0423 code: air mix door number 2 inoperative error. No idea what this could be, and it seems that I cant search this new forum setup, or I havent figured out how to yet. Any help or suggestions would be appreciated. Sort by Oldest first Oldest first Newest first Most reactions #2 · May 7, 2010 Isn't that a climate code(heat or A/C)? #3 · May 7, 2010 I have no idea #4 · May 9, 2010 someone? #5 · May 9, 2010 there are no 'B' codes. How did you get this code from the car? #6 · May 9, 2010 (Edited) "B" codes are body codes. It's not a VAG code, but I guess it is theoretically possible that another type of scanner (from Snap-On or OTC maybe?) translated a VAG code into some kind of generic "B" code. What year and model? Automatic or manual climate control? Sounds like a problem with either a blend door or vent control door behind the dash. If the heat and a/c work, and you can switch between defrost-panel-floor vents normally, I'd just clear it or ignore it. #7 · May 9, 2010 the car is 1999.5 jetta 2.0 5spd manual climate control. I got it scanned at my local auto parts store so its quite possible that the code got "translated". If for some reason the B really should be a P the code could have something to do with my cat or 02 sensors. I'm going to try and get someone with vag-com to scan it to see if there is a discrepancy. Also, my heat AC work fine. #8 · May 9, 2010 "P0423" would be "Heated Catalyst Below Efficiency". That would most likely be the cat is failing, if no other codes for O2 sensors are present. #9 · May 10, 2010 Yes, but it makes sense that a "B" code would have the air door description attached to it. If he had said that the "B" code was for a cat efficiency, I'd agree that the B should be a P. Something definitely isn't adding up here. Get the car connected to a VAG-COM and see what comes up. #10 · May 10, 2010 Having NEVER worked with a generic reader, only the VAG-Com, I've never seen a "B" code, only the VAG codes and those have the "P" codes with them. And I've never seen anyone bring a code in that was not either from the ECU or TCM from one of those generic readers. Outside of those two modules, I don't know if they can read them. And a "B" code will not cause a CEL. And since he does not have Climatronic, the car will not generate that code. So, yes get it either on VAG-Com or the dealer tool(VAS1551) and see what the real deal is. #11 · May 10, 2010 There are a couple scan tools beside VAG-COM that are very capable of reading most, if not all, modules in all cars, VW's included. However, they're very expensive (priced from $3500-$10,000), and generally sold only to professional repair shops as shop equipment. In fact, Snap-On took VAG software and simply modified it to work with the unique button configuration on their MODIS scanner. LAUNCH took VAG software and configured it to work with their touch-screen scanner design. Still though, I can't figure how he got a "B" code from a VW (a scanner discrepancy is the only possibility I can think of) or how he's getting an air door code from a manual climate system... Also, it's good to know that Ross-Tech's VAG-COM is also an excellent generic OBDII scan tool for any make/model from 1996-present. If you want to play around with generic OBDII functions to learn how they work, plug the VAG-COM into any car's OBDII port and click the "OBDII" button on the first screen. #12 · May 10, 2010

Anony00GT said: Also, it's good to know that Ross-Tech's VAG-COM is also an excellent generic OBDII scan tool for any make/model from 1996-present. If you want to play around with generic OBDII functions to learn how they work, plug the VAG-COM into any car's OBDII port and click the "OBDII" button on the first screen. Click to expand...

Yup, I have had to do that a time or two. But the ones at autozone have little capability other than to scan the engine module, AFIAK. 0 Reply Insert Quotes Post Reply

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