Detroit DD15 GHG14 (2014-16) Fault Code: SPN 1121 FMI 19 (CPC) Service Brake Switch Signal from EBC1 is Erratic

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

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

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

NOTE: If the ECM hasn’t been configured or programmed recently, then check all other modules on the truck (Cab, ABS, Transmission, etc…) for errors. Repair those as needed.

Categories DD15 GHG14 (2014-16), Detroit, DTC TRUCKS Tags 1121, 16, 19, 2014, Brake, Code, CPC, DD15, Detroit, EBC1, Erratic, Fault, FMI, from, GHG14, is, Service, signal, SPN, Switch

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