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Engine light with error code U0029

Conrad668s
in Audi A6 (C7) Forum

Featured Replies

Hi,

Had my 2016 allroad for nearly 3 weeks and get occasional engine light with my cheap code reader displaying U0029

Regular mechanic can't get any further with his diagnostics and recommend taking to Audi. 

Anyone had experience of this code? 

Cruise control doesn't work and it won't do a regen on dpf either. Using loads of diesel. 

Google says NoX sensor or canbus issue

 

 

  • 1 month later...
On 11/3/2022 at 8:47 PM, Conrad668s said:

Hi,

Had my 2016 allroad for nearly 3 weeks and get occasional engine light with my cheap code reader displaying U0029

Regular mechanic can't get any further with his diagnostics and recommend taking to Audi. 

Anyone had experience of this code? 

Cruise control doesn't work and it won't do a regen on dpf either. Using loads of diesel. 

Google says NoX sensor or canbus issue

 

 

Hi did you ever get to the bottom of this fault ?   

I have same issue with a q7 

  • 3 weeks later...

defiantly a Nox sensor issue, that car cant talk to the sensor for whatever reason

The easy one is check the sensor is not dead after that you looking at checking the wiring unfortunately which is a right pain

  • Author

Cheers. Still waiting on the dealership to arrange repair

  • 1 year later...
On 1/22/2023 at 11:07 PM, Conrad668s said:

Cheers. Still waiting on the dealership to arrange repair

Hi bud have you sort it ? What was the issue?

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