This code indicates that a control module in the vehicle is receiving erratic, corrupted, or implausible data from the Hybrid EV Powertrain Control Module over the communication network. It typically points to a network communication error, wiring issue, or software glitch rather than a mechanical failure.
Corroded, loose, or damaged wiring and connectors between the Hybrid EV Powertrain Control Module and the receiving module are the most common culprits for data corruption.
A software glitch or calibration mismatch within the modules can cause them to misinterpret data, often occurring after a module replacement or battery disconnect.
A weak 12-volt battery or charging system issue can cause modules to malfunction and transmit invalid data across the network.
High resistance, short circuits, or open circuits on the Controller Area Network (CAN) bus lines will corrupt the data stream between modules.
The sending module itself may have an internal hardware failure causing it to output bad data, though this is much less common than wiring or software issues.
No, it usually does not. While the sending module could be faulty, this code is far more often caused by damaged wiring, poor connections, or software glitches rather than a failed computer.
It is generally not recommended. Because the hybrid control data is compromised, the vehicle may enter a fail-safe or limp mode, stall, or experience a sudden loss of hybrid drive functionality.
Yes. Hybrid control modules require stable voltage to communicate properly. If the 12-volt system is weak, modules can drop offline or send corrupted data packets, setting network codes like U0594.
Because the code explicitly mentions the Powertrain Control Module, it is frequently misdiagnosed as a failed computer. However, replacing the PCM rarely fixes U-codes unless all wiring, network, and software possibilities have been thoroughly ruled out first.