Detroit DD13 GHG14 (2014-16) Fault Code: SPN 120 FMI 13 (CPC) Retarder Fluid Message is Missing or Not Available

NOTE: Please see the step by step troubleshooting procedures for this specific code.

NOTE: If code 164-0, 168-14, or 168-18 are present, fix those first.

NOTE: If code 625-9 present, fix that first.

NOTE: If any engine module has been programmed recently, check to make sure it was programmed properly.

NOTE: Otherwise, the problem is another computer on the vehicle causing the problem (Transmission, cab, ABS, etc…)