Help with engine codes P0299 and P0420
02-01-2010, 10:51 AM
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Help with engine codes P0299 and P0420
Does anyone have had the same codes simultaneously? If I reset them with vag-com, they light up the CEL again within 1-2 days. Car feels little bit powerless, but otherwise running OK.
Control Module Part Number:
Component and/or Version: 1.8L R4/5VT G 0004
Software Coding: 0011701
Work Shop Code: WSC 63351
2 Faults Found:
16683 - Boost Pressure Regulation: Control Range Not Reached
P0299 - 002 - Lower Limit Exceeded
16804 - Catalyst System: Bank 1: Efficiency Below Threshold
P0420 - 002 - Lower Limit Exceeded
Control Module Part Number:
Component and/or Version: 1.8L R4/5VT G 0004
Software Coding: 0011701
Work Shop Code: WSC 63351
2 Faults Found:
16683 - Boost Pressure Regulation: Control Range Not Reached
P0299 - 002 - Lower Limit Exceeded
16804 - Catalyst System: Bank 1: Efficiency Below Threshold
P0420 - 002 - Lower Limit Exceeded
02-01-2010, 03:07 PM
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read these, maybe they will help:
http://www.audizine.com/forum/showthread.php?t=238527
http://audiforums.com/forum/showthread.php?t=136231
sounds like a couple things, maybe a bad cat or bad O2 sensor and a bad diverter valve.
http://www.audizine.com/forum/showthread.php?t=238527
http://audiforums.com/forum/showthread.php?t=136231
sounds like a couple things, maybe a bad cat or bad O2 sensor and a bad diverter valve.
02-02-2010, 11:14 AM
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Thank you.
I did some vag comming on boost requested vs actual and N75 duty cycle.
Seems that my actual boost is lower, but also higher on some point.. What does it suggest?
Charts here Clickclick
I did some vag comming on boost requested vs actual and N75 duty cycle.
Seems that my actual boost is lower, but also higher on some point.. What does it suggest?
Charts here Clickclick
07-14-2011, 12:38 PM
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Hey all - first time post - long time Audi driver...
I have the P0420 and P0299 codes simultaneously as well. Cars runs well just a bit low on "boost". First guess is that my cat needs to be replaced - apparently while I was waiting for the coil pack recall to go in to effect, gasoline was leaking into my cat which caused some (maybe significant) damage. A friend recomended the 034 MotorSport Hi-Flow Cat - any thoughts on that model or any other suggestions? Thanks from the newbie on the forum.
And before I forget - 2005 Audi A4 Quattro 1.8T
I have the P0420 and P0299 codes simultaneously as well. Cars runs well just a bit low on "boost". First guess is that my cat needs to be replaced - apparently while I was waiting for the coil pack recall to go in to effect, gasoline was leaking into my cat which caused some (maybe significant) damage. A friend recomended the 034 MotorSport Hi-Flow Cat - any thoughts on that model or any other suggestions? Thanks from the newbie on the forum.
And before I forget - 2005 Audi A4 Quattro 1.8T
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