RAM
08-334-25 REV. A
Manufacturer communications
- Publication date
- 2025-10-11
- Received by NHTSA
- 2025-10-15
- NHTSA record numbers
- 11024303
Manufacturer summary
Original wording in English
Unable To Start Vehicle - Shifter Inoperable Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):
• B2199-16 - Battery Voltage-circuit Voltage Below Threshold.
• B21DD-84 - System Voltage-signal Below Allowable Range.
• C2129-00 - Battery Voltage. Customers may also comment on one or more of the following:
• Unable to start vehicle.
• Gear shifter spins freely with no PRNDL LED indication on the Automatic Gear Shift Module (AGSM). This bulletin involves replacing the AGSM.
• B2199-16 - Battery Voltage-circuit Voltage Below Threshold.
• B21DD-84 - System Voltage-signal Below Allowable Range.
• C2129-00 - Battery Voltage. Customers may also comment on one or more of the following:
• Unable to start vehicle.
• Gear shifter spins freely with no PRNDL LED indication on the Automatic Gear Shift Module (AGSM). This bulletin involves replacing the AGSM.
Reported code forms
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
Ram
B2199-16Battery Voltage-circuit Voltage Below ThresholdRam
B21DD-84System Voltage-signal Below Allowable RangeRam
C2129-00Battery VoltageCheck 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 | 2025 |