LS XR4155H throwing several error codes

[chicklitter]

Our 2018 LS XR4155H started throwing several error codes yesterday. Through lots of research (thanks to this forum and some super old threads mostly) I've managed to figure out what two of the three error codes mean, but one has me completely stumped.

S173 | F31 —> DPF In temp sensor fault
S173 | F03 —> DPF In temp sensor high fault
S51 | F03 —> ?????????

My guess is that they're all related, especially since it keeps trying to regen every time I turn it on. RPMs aren't limited, so we're not having the limpness that others have experienced. I just cannot find that last error code and what it means. Anyone have any knowledge they can lend?

 

[PCABE5]

S51-F03 - ACV driver short circuit to battery

 

[Cycledude]

I am also a XR4155 owner, haven’t experienced any issues yet (only 55 hours) but am very interested to find out what it takes to fix yours.

 

[Avenger]

According to the manual, that code is a ACV position high fault.

Please keep us posted.