Hello!
I just bought a Volvo V90 CC and I wonder if anyone knows anything about the fault codes P20C9 & P20B9? It's saying reductant heater A. But I think it's working according to the troubleshooting steps I on the internet.

Everything feels normal and working. But engine light is on + start/stopp system doesn't work. I don't want to leave it to a Volvo workshop yet because it's pretty expensive haha...

If someone has a link to an ESM it would be perfect.

 

Is your car a diesel? Have you tried clearing the codes to see if they return?

 

Yes, it's a D4. I've cleared them a couple of times and they return.

The car was for sale for 2 weeks, I've emptied and filled up new adblue and diesel. Talked with a Volvo workshop, they told me that it's probably the nox sensor, so I've ordered one today!