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2001 Audi A6 Quattro 2.8L CEL
Posted to European Driveability on 3/25/2009 7 Replies

Hello all thanks for your time in reading this. This vehicle came in with a CEL for converter warm up efficinecy below threshold (both banks), light has been on for about a year. O2 sensor signals do not appear lazy. Codes apply to the primary converters right...

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Message Closed w/Summary

car Vehicle Data

2001 Audi A6 Quattro

VIN WAUEH64B11
Engine2.8 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsCEL
OccursAlways
Misc.2.8L V6

Trouble Codes

P0421Catalytic Converter Efficiency (Bank 1)
P0431Catalyst Efficiency Below Normal (Bank 2)
P12965-Volt VREF Supply Not Present
Message Closed w/Summary

car Vehicle Data

2001 Audi A6 Quattro

VIN WAUEH64B11
Engine2.8 L / 6 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsCEL
OccursAlways
Misc.2.8L V6

Trouble Codes

P0421Catalytic Converter Efficiency (Bank 1)
P0431Catalyst Efficiency Below Normal (Bank 2)
P12965-Volt VREF Supply Not Present