# 14 V Power Module Powertrain Expansion Communication Bus Off

Source: https://obdlens.com/codes/u1795/
Last built: 7508d481ba6c398f25ed

[Diagnostic knowledge](https://obdlens.com/knowledge/) / U1795 — 14 V Power Module Powertrain Expansion Communication Bus Off

U1795

U1795 is described as “14 V Power Module Powertrain Expansion Communication Bus Off” in the GM reference. 

Some scan tools (for example GM and Ford dealer tools) display this code with a failure-type suffix, such as U1795-00 or U1795:00; the base code U1795 is the same.

Manufacturer reference family

## GM: U1795

en14 V Power Module Powertrain Expansion Communication Bus Off

Reference namespace: gm

Source revision: legacy-oem-dtc-r2-20260924

Reference family assigned by the production catalog. An entry in this family is not proof of a fault or ECU support on every listed vehicle.

## What should I check before using this definition?

Keep the full code, module, status and freeze-frame data. Confirm the vehicle’s make, model, year and current manufacturer service information before choosing a repair. This entry does not identify a failed part by itself.

[Organize a scan report or recording](https://obdlens.com/analyze/)

Source and applicabilityOBD Lens production library legacy-owner-2026-11-02-v84-evidence. This is a scoped technical reference, not a scan of your car. A catalog relationship does not certify that every ECU, year or engine returns the same signal or code definition.

[Read the reference method](https://obdlens.com/about/)

## What does U1795 mean?

14 V Power Module Powertrain Expansion Communication Bus Off. 1 reference families define this identifier: GM.

## Is U1795 a generic or manufacturer-specific code?

Check the reference scope shown above for this identifier.

## Can U1795 tell me which part has failed?

This entry does not identify a failed part by itself. Confirm the vehicle’s make, model, year and current manufacturer service information before choosing a repair.

## Continue with your vehicle

Use a specific profile to explore its enhanced signals and assigned code-reference families.

[Find a vehicle profile](https://obdlens.com/vehicles/)

## Read data from your car

Basic diagnostics and supported enhanced PID access remain free.

[Explore OBD Lens App](https://obdlens.com/app/)

OBD Lens reference library · catalog legacy-owner-2026-11-02-v84-evidence. [Sources and scope](https://obdlens.com/about/)

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Reference-family membership is not proof that a code applies to every listed ECU or vehicle. Runtime-ready definitions are not physical-vehicle validation. Unavailable readings must not be treated as zero. App and hardware sale availability must be checked separately.