RAM 1500 2026 — technical service bulletin
Bulletin 08-226-26 REV. A · NHTSA communication 11034315 · issued Jun 16, 2026
Technical service bulletin
communication type
Electrical System
component
2026
model years
1
vehicle entries
Official summary
Flash: Electronic Shift Module (ESM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0607-00 - ECU Internal Performance. NOTE: DTC P0607-00 will be stored in the Automatic Gearbox Shifter Module (AGSM)/Electronic Shift Module (ESM). ● P1DF3-00 - ECU Not Initialized. NOTE: DTC P1DF3-00 will be stored in the Transmission Control Module (TCM). Customers may also comment on one or more of the following: ● Shifter not able to move out of Park with "Service Shi
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.