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Diagnostic knowledge / P1896 — CAN data bus, ABS/TCM - torque request signal malfunction
P1896

CAN data bus, ABS/TCM - torque request signal malfunction

P1896 is described as “CAN data bus, ABS/TCM - torque request signal malfunction” in the GM reference.

Some scan tools (for example GM and Ford dealer tools) display this code with a failure-type suffix, such as P1896-00 or P1896:00; the base code P1896 is the same.

Manufacturer reference family

GM: P1896

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CAN data bus, ABS/TCM - torque request signal malfunction

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
Source and applicability

OBD 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

What does P1896 mean?

CAN data bus, ABS/TCM - torque request signal malfunction. 1 reference families define this identifier: GM.

Is P1896 a generic or manufacturer-specific code?

Check the reference scope shown above for this identifier.

Can P1896 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.

OBD Lens reference library · catalog legacy-owner-2026-11-02-v84-evidence. Sources and scope