Unmapped SPN/FMI ?

[Whitetail15]

Can anyone help with this warning code on 2016 G23 please. I got this engine diag code today on way back to dock.

source: fuel sender
engine hours 109.5
plug 0
SPN 731
FMI 15
count 1
Description= Unmapped Spn/fmi

everything seems fine, no issues

[a0128]

SPN 731 is related to Knock1 sensor. Unfortunately the Failure Mode Identifier (FMI) code (15) is not listed. Probably why the display shows unmapped spn/fmi.

Likely the sensor is failing or you have picked some bad fuel.

[Whitetail15]

should i just clear and see if it ever comes back or head to dealer?

[a0128]

should i just clear and see if it ever comes back or head to dealer?

Based on what you indicated - "no issues" - I'd clear it and see if it comes back. I'd would also contact your dealer, give them the codes and get their prognosis. Are you the original owner? If so, the warranty should cover any repairs.

[Whitetail15]

thanks for the help