TSB: Dodge Hornet Software Update

This bulletin addresses issues in the 2024 Dodge Hornet PHEV, including MIL illumination and diagnostic trouble codes related to the electric coolant pump and battery cooling system, caused by outdated DPIM software.

Dodge Hornet Software Update

This bulletin applies to 2024 Dodge Hornet vehicles equipped with a 1.3L I4 DOHC Turbo PHEV engine. The MIL may be on, accompanied by DTC P2601-00 (electric coolant pump control circuit performance stuck off), U0623-00 (lost communication with coolant pump “A”) and/or P1DBA (battery cooling system failure, module, hybrid control processor HCP).

The vehicle is not performing a scheduled cabin preconditioning (cabin preconditioning unavailable message). The cause: DPIM software. Inspect and reprogram the DPIM with the latest software.

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