27 March, 2025CAT 3126B Fault Code: 164-4 PID: Flash Code 15 SPN: 164 FMI: 4 Injection Actuation Pressure Short Circuit The customer parameter PTO configuration is programmed to remote throttle and the PTO On/Off switch is ON. The ECM is not receiving a correct PTO throttle signal Share on Facebook Opens in a new window. Tweet on Twitter Opens in a new window. Pin on Pinterest Opens in a new window. Back to blog Leave a comment Name * Email * Comment * Please note, comments need to be approved before they are published.