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October 8, 2025 Service bulletin

Unable To Start Vehicle

Ram technical service bulletin 08-334-25 for 2025 Ram 1500.

Bulletin number
08-334-25
Component
Power train
Summary
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.

Owners of these vehicles have filed 52 complaints in the transmission category.

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