Emissions Test Fail Codes
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1st Gear
Joined: Mar 2008
Posts: 54
From: Chicago
Emissions Test Fail Codes
I recently brought my 2003 A6 in for emissions testing and it failed due to the following codes:
P0421
P0741
Can anyone tell me what these codes mean? It would be much appreciated. Thank you in advance.
P0421
P0741
Can anyone tell me what these codes mean? It would be much appreciated. Thank you in advance.
3rd Gear
Joined: Nov 2007
Posts: 1,980
From: Northern California
P0421-Passenger side catalytic converter efficiency below threshold
P0741-Torque converter clutch circuit
I would suggest the following:
P0421 - Search for "spark plug anti fouler trick"
P0741 - Drain and fill your transmission with correct fluid.
These suggestions are temporary in nature....
P0741-Torque converter clutch circuit
I would suggest the following:
P0421 - Search for "spark plug anti fouler trick"
P0741 - Drain and fill your transmission with correct fluid.
These suggestions are temporary in nature....
1st Gear
Joined: Sep 2010
Posts: 409
From: Boston MA
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