I'm going to try and dig into this on Friday.

Codes don't change after disconnecting sensors one at a time. I wasn't sure where the fuel tank pressure sensor is located.

RickHaleParker wrote: 23 Feb 2018, 00:58 You might try disconnecting sensors in the lists below and see if the DCTs change.

Thanks for that great info. I will start with disconnecting the sensors one at a time and see what that does to the codes. I will post the results.

I've still have had no luck getting rid of these codes.

Is there a plug for this harness between the sensors and the ECU that I could pull apart and clean?

abscate wrote: 14 Feb 2018, 09:53 We don't host these here by agreement with Volvo legal, but they are public on the web if you google them. You CAN post the relevant parts back here without getting us in trouble, we just have agreed not to archive them here.

Good to know thanks

I'm still trying to figure out these codes. I pulled an atmospheric pressure sensor out of the junk yard to try out and it didn't fix the problem. I'm not sure if it is a good sensor though. I really need to figure out how to test the sensor to see if it is good. I don't want to spend the money ...

I did reset the codes and they keep coming back. I'm using VOL-FCR 1.7.6

I'll try and get to the junk yard to get a couple of atmospheric pressure sensors to try out.

I have two codes that I have not been able to get rid of.

Efi-444 accelerometer signal

Efi-422 atmospheric pressure sensor signal.

I tried swapping out the accelerometer from my parts car but the code stayed on. I'm not sure it the problem is the sensors or the wiring. I need to figure out how to ...

Mine already looks like that picture. The switch on the parts car is still intact.

I ended up swapping the VSS from my parts car and the AT-232 didn't come back.
The AT-143 code seams to be a bad kickdown switch. I'm going to try swapping it too.