ALFA ROMEO

08-400-25

Manufacturer communications

Publication date: 2025-12-12
Received by NHTSA: 2025-12-17
NHTSA record numbers: 11026679

Manufacturer summary

Original wording in English

Flash: Power Inverter Module (PIM) Updates 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):
• P2601-00 - Electric Coolant Pump Control Circuit Performance Stuck Off.
• U0623-00 - Lost Communication With Coolant Pump "A".
• P1DBA - Battery Cooling System Failure (Module, Hybrid Control Processor (HCP)). **Customers may experience the following:
• The vehicle is not performing a scheduled cabin preconditioning. 'Cabin Preconditioning Unavailable' message present when the scheduled cabin condition is not performed as planned.** This bulletin involves reprogramming the Auxiliary Hybrid Control Processor (AHCP) and Hybrid Control Processor (HCP) also known as PIM, with the latest available software

NHTSA manufacturer communications ↗

Reported code forms

P1DBA P2601 U0623

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

Alfa RomeoP1DBA

Battery Cooling System Failure (Module, Hybrid Control Processor (HCP))

NHTSA 11010632 · NHTSA 11011906 · NHTSA 11026679

Alfa RomeoP2601-00

Electric Coolant Pump Control Circuit Performance Stuck Off

NHTSA 11010632 · NHTSA 11011906 · NHTSA 11011918

Alfa RomeoU0623-00

Lost Communication With Coolant Pump "A"

NHTSA 11026679 · NHTSA 11027234 · NHTSA 11034319

Check 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
Alfa Romeo	TONALE PHEV	2024

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