P1781 Chevrolet - Engine control module (ECM), torque reduction signal - out of range

Engine control module (ECM), torque reduction signal - out of range. The control module detected that the Engine control module (ECM), torque reduction value was outside the valid range. This is the manufacturer-specific definition used by Chevrolet.

P1781 is a manufacturer-specific code. In this database it is documented for: Chevrolet. The same number can mean something different on other brands.

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.