RAM
08-226-26 REV. A
Manufacturer communications
- Publication date
- 2026-06-16
- Received by NHTSA
- 2026-07-02
- NHTSA record numbers
- 11034315
Manufacturer summary
Original wording in English
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 Shifter" message showing on Instrument Panel Cluster (IPC).
• PRNDL lights flashing. **This bulletin involves inspecting and possibly reprogramming the ESM with the latest software.**
• 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 Shifter" message showing on Instrument Panel Cluster (IPC).
• PRNDL lights flashing. **This bulletin involves inspecting and possibly reprogramming the ESM with the latest software.**
Reported code forms
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
Ram
P0607-00ECU Internal PerformanceRam
P1DF3-00ECU Not InitializedCheck vehicle applicability
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ram | 1500 | 2026 |