Service bulletins for the 2020 Freightliner Cascadia
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
661 on file from NHTSA, as of 2026-10-19.
By type
By component
Only bulletins with component: Electrical system are shown. Show all
| CALFTL54-016 | 2021-04-24. Service bulletin. ELECTRICAL SYSTEM. Customer Advisory Letter for Battery Cable Access (BCA) 29A Cable Inspection. |
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| TechTalk12303K | 2021-04-05. Service bulletin. ELECTRICAL SYSTEM. Tech Talk discussion on central gateway (CGW) location. |
| CALFTL54-015 | 2021-03-26. Service bulletin. ELECTRICAL SYSTEM. Customer Advisory Letter for Disabling the Park Brake Drag ICU Warning Message. |
| SS3071FTL2021 | 2021-03-25. Service bulletin. ELECTRICAL SYSTEM. Service Solution for New Cascadia Maintenance Indicator Issues. Some customers have reported incorrect or undesired pop up messages occurring in the ICC5 display and have requested field correction. |
| SS3070FTL2021 | 2021-03-25. Service bulletin. ELECTRICAL SYSTEM; LANE DEPARTURE. Service Solution for P4 New Cascadia Side Guard Radar Harness Moisture Intrusion. The 6-pin connector located at the side radar can show signs of water intrusion if wires are strained at the connector. Wires without strain relief can allow water to intrude past the seals, resulting in corrosion on the terminals and pins within the connector. Active fault codes for lost communication with RDU and SRRM, plus other codes for CPC, CGW and ABS. |
| SB54-341 | 2021-03-25. Service bulletin. WHEELS; ELECTRICAL SYSTEM. Updated Freightliner Service Bulletin for Tire Pressure Monitoring System (TPMS) Water Intrusion. This bulletin replaces the bulletin dated 02/08/2021. The location for the date stamp has changed. A note has been added to Fig. 2. |
| WP21-007 | 2021-03-24. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Warranty Policy Letter for battery tags. DTNA determined that since adopting the AutoMeter BCT-460DTNA Powernet Assessment Tool (AutoMeter) as the required powernet system tester, not all battery tags have to be retained support Warranty-related claims. |
| TechTalk8142 | 2021-03-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Tech Talk discussion on Radio issue while in AM mode and inverter on. |
| TechTalk4855 | 2021-03-02. Service bulletin. VISIBILITY; ELECTRICAL SYSTEM. Tech Talk continued discussion for P4 Next Gen Cascadia dome lights stay on while driving. |
| P4HALOGENUPDATE | 2021-03-02. Service bulletin. VISIBILITY; ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Customer Maintenance Enhancements for the P4 Halogen Lamp replacement procedure. |
| SS1034884 | 2021-02-27. Service bulletin. ELECTRICAL SYSTEM. Service Solution for P4 New Cascadia Unintended Dome Lamp Activation Due To Poor Connections at the sSAM. |
| SB54-341 | 2021-02-26. Service bulletin. TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS; ELECTRICAL SYSTEM. Freightliner Service Bulletin for Tire Pressure Monitoring System (TPMS) Water Intrusion. |
| WI21-006 | 2021-02-26. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Warranty Information Letter for Detroit NOx Sensor Circuit Fault Codes - Claim Guidelines. |
| TechTalk8060 | 2021-02-03. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT. Tech Talk discussion on cgw lost communication with cpc. |
| TechTalk8093 | 2021-02-02. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN; ENGINE AND ENGINE COOLING. Tech Talk discussion on Cummins ISX fault 5865. |
| TechTalk8022 | 2021-02-02. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; POWER TRAIN. Tech Talk discussion on Modules not powering up after being jumped. |
| Techtalk5525 | 2021-02-02. Service bulletin. ELECTRICAL SYSTEM. Tech Talk discussion regarding the refrigerator power supply when the ignition is off. |
| SS1034492 | 2021-01-28. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Superseded Service Solution for New Cascadia P4 Coolant Level Wiring Damage. Fault codes can be generated if wiring to the coolant level sensor becomes damaged. This Service Solution has been superseded to service bulletin SB 54-337. Please see the service bulletin for the most current information. |
| SB54-342 | 2021-01-26. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Freightliner Service Bulletin for Rain/Light Sensor Removal. On New Cascadia vehicles, a delay in the timing of communication (hand shake) between the rain/light sensor (RLS) and sSAM generates fault code "33/521940/12 - rain/light sensor - general DTC timeout", which causes the sensor to stop working. |
| SB54-337 | 2021-01-22. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Freightliner Service Bulletin for Coolant Level Sensor Wiring Repair. On New Cascadia vehicles, depending on the tension applied to the harness located at the coolant level sensor and its mounting locations, wiring damage can occur, resulting in one or more of the below listed fault codes. |
| Techtalk7997 | 2020-12-31. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. Tech Talk discussion on trailer lights fuse. |
| SS1034868 | 2020-12-30. Service bulletin. ELECTRICAL SYSTEM. Service Solution for flickering overhead reading light during slight movement of the steering wheel for New Cascadia with DR 40SI alternators, possibly other alternators as well. The flickering overhead light is considered a nuisance, and can be simply eliminated by either adding an accessory to one of the power receptacles, or running an additional ground in one of the sleeper bunk lamps to suppress the ripples on the circuit. |
| TechTalk7850 | 2020-12-04. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Tech Talk discussion on P4 ACM Not Communicating. |
| TechTalk7905 | 2020-12-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; VISIBILITY. Tech Talk discussion on tractor, loses markers and wipers intermittently. |
| TechTalk7894 | 2020-12-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Tech talk discussion on ICC 5 loudspeaker faults. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.