U0594Invalid Data Received From Hybrid/EV Powertrain Control Module
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The hybrid or EV powertrain controller coordinates engine, motors and battery, so many modules read its messages. Ford's hybrid OBD summary explains that the ABS module logs U0594 when wheel-torque or driver-demand signals from the HPCM are flagged invalid, unknown or faulted; Ford's 2014 list carries it with MIL and its 2024 summary sets U0594_48 for bad monitoring data with MIL and wrench lamp. GM's 2023 brake tables expect serial data 31 from the module and set U0594, Type B, after 20 consecutive wrong authentication codes or a frozen alive counter. FCA names it implausible data from the HCP: on the 2020–21 Ram 1500 eTorque a poorly seated motor-generator connector led to stalling and a new MGU. Ford also found harmless U0594 entries in the Escape cluster and Lightning heat pump valve module.
- What you may notice
- Check engine light and hybrid or electrical system warning
- Reduced power or stalling on some hybrids
- Stored code without symptoms (Ford Escape, F-150 Lightning)
- Likely causes
- LikelyFault inside the hybrid system makes the controller mark its signals invalid (e.g. MGU connector on Ram eTorque)
- LikelySoftware of the hybrid controller or the receiving module out of date
- RareCAN wiring or termination disturbed
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.