This code indicates that a control module on the vehicle network—typically the powertrain control module or electronic power steering module—has received data from the Steering Effort Control Module that is corrupted, out of specification, or not in the expected format. The receiving module recognizes the sender but cannot trust the information, which usually points to an internal fault in the transmitting module or communication errors on the CAN bus.
The module generating the steering effort data has suffered an internal circuit fault or software corruption causing it to transmit invalid frames on the network.
Open circuits, short-to-ground, or high resistance in the high-speed CAN lines between the steering module and the receiving controller corrupt the data packets during transmission.
Poor connections, voltage drops, or insufficient ground paths cause the steering effort module to operate erratically and broadcast garbled data.
Non-original accessories tapping into the CAN bus or power circuits create signal noise that distorts the data packets received by the control modules.
Rarely, the module interpreting the data has a failed CAN transceiver that incorrectly validates good data as invalid; this should only be considered after eliminating the transmitting module and network integrity.
It is not recommended, as the fault can cause sudden loss of power steering assist or unpredictable steering effort, creating a safety hazard.
Usually not. The code specifically concerns data coming FROM the Steering Effort Control Module, not the PCM. While a faulty PCM receiver is theoretically possible, it is statistically unlikely; the root cause is almost always the steering module itself or the wiring between modules.
Yes. Low system voltage or poor grounds can cause the steering effort module to transmit erratic data or cause signal corruption on the CAN bus, triggering this code without the module itself being defective.
It is the computer that monitors steering wheel torque and speed inputs and calculates the required assistance level for electric power steering systems, then reports this data to other modules via the CAN bus.