Technical Service Bulletin 21-007-26 — 2026 RAM 2500
POWER TRAIN
Bulletin Details
| TSB ID | 21-007-26 |
| Manufacturer | |
| Vehicle | 2026 RAM 2500 |
| Component | POWER TRAIN |
| Communication Date |
Bulletin Summary
Flash: Transmission Control Module (TCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0826-00 - Up/Down Shift Switch. ● P0827-00 - Up/down Shift Switch Circuit Low. ● P085F-00 - Up And Down Shift Switch Circuit Range/performance. Customers may also experience one or more of the following: ● **Customer is unable to switch the ignition to OFF when in Park gear. ● After shifting into Park, the Instrument Panel Cluster (IPC) will display that the transmission is in Neutral.** NOTE: **The transmission will actually be in Park and able to hold the vehicle, but the cluster display would indicate Neutral, preventing the engine from shutting off.** ● Rough/bumpy 2-3 power on upshifts and/or 3-2 coast down shifts. ● Vehicle enters into limp home mode. Other software improvements: ● Decreased sensitivity to DTCs P1D8A and P1D8B. This bulletin involves reprogramming the TCM with the latest available software.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2026 RAM 2500
08-018-26
ELECTRICAL SYSTEM
18-101-25
UNKNOWN OR OTHER
S2508000099
ELECTRICAL SYSTEM
21-046-25
POWER TRAIN
08-329-25 REV. A
ELECTRICAL SYSTEM
08-329-25
ELECTRICAL SYSTEM
S2323000020 REV.B
ELECTRICAL SYSTEM
OTHERDOC_147
ELECTRICAL SYSTEM