Code
U0594
Generic
U — Network/User
Invalid Data Received From Hybrid/EV Powertrain Control Module
Views:
UK: 14
EN: 27
RU: 22
AI status
Completed
Completed
100%
Causes
- Corrupted CAN/CAN-FD or LIN messages from the Hybrid/EV Powertrain Control Module
- Faulty or intermittent wiring, connectors, grounds or shield on the network carrying HV powertrain messages
- Failed or failing Hybrid/EV Powertrain Control Module (inverter, PTC/PCM-like HV controller)
- Low or unstable 12 V supply, low battery, or poor ground affecting module operation
- Missing or incorrect software calibration or firmware mismatch after module replacement or update
- Bad termination, bus short to battery/ground, or electrical noise/EMI on the data bus
Symptoms
- MIL/onboard warning light illuminated (Check Hybrid/EV System, Service Electric)
- Reduced engine/motor power, limited performance or limp-home mode
- Hybrid/EV functions disabled or limited (no regenerative braking, no EV drive)
- Loss of charging or vehicle refuses to charge (depending on design)
- Multiple related DTCs stored in other network modules
- Intermittent or persistent driveability faults correlated with vehicle speed/load
What to check
- Use OEM-capable scan tool to read U0594 and all related codes and freeze-frame data
- Check for other U0xxx or CAN bus errors in BCM, ECM, TCM, ABS, charger, or inverter modules
- Verify 12 V battery voltage and state during fault occurrence (stable >12.2 V at key on/load)
- Visually inspect connectors, harnesses and shielding at the Hybrid/EV Powertrain Control Module and associated junctions
- Check CAN/CAN-FD bus idle voltages and differential with a multimeter/oscilloscope (each line ~2.5 V; proper dominant and recessive waveforms; termination ~60 Ω across bus)
- Inspect fuses, relays and HV interlocks that supply or enable the module
Signal parameters
- HV Battery Pack Status: state of charge (SOC) 0–100% (should be plausible for driving condition)
- HV Pack Voltage: vehicle-specific (example range 200–800 V depending on vehicle) — should be within manufacturer spec
- Pack Current/Charge Current: negative/positive values within expected amperage range for conditions
- Inverter/Motor Status Flags: enabled/disabled, fault bits — should not be reporting invalid codes
- DC-DC Converter Status: enabled/disabled and output 12 V system voltage ~13–14.5 V when running
- CAN/CAN-FD bus voltage: CAN_H and CAN_L idle ≈2.5 V each; differential and dominant levels observed on scope
Diagnostic algorithm
- Record freeze-frame and full set of codes with an OEM scan tool; note time, SOC, and vehicle conditions when the code set.
- Attempt to reproduce the fault while monitoring real-time data for HV pack voltage, SOC, inverter status and related messages.
- Check for accompanying network errors (bus-off, timeouts, other U-codes). If bus errors present, focus on wiring/termination.
- Visually inspect connectors, pins and shielding at the hybrid/EV powertrain module, inverter, battery management unit and related harnesses; repair corrosion, bent pins, or damage.
- Measure CAN/CAN-FD bus voltages and use an oscilloscope to verify message integrity, voltage levels and termination (look for noise, missing messages, or corrupted frames).
- Verify 12 V supply and grounds to the hybrid/EV powertrain module under load; repair poor battery/ground connections or replace weak battery.
- Check and replace blown fuses, relays or interlocks that could cause intermittent module resets or invalid data.
- If wiring and bus integrity are good but invalid data persists, check for correct software/firmware levels; perform reprogramming or software update per manufacturer instructions.
- If software update does not clear invalid-data condition, bench-test or replace the affected Hybrid/EV Powertrain Control Module following OEM procedures and reprogram as required.
- After repairs, clear DTCs, perform a road test under the conditions that produced the code, and confirm no reappearance. Re-scan all modules for related faults.
Likely causes
- Loose/corroded connector or pin at the hybrid/EV powertrain module
- CAN bus wiring damage (chafing, water intrusion, pinched shield)
- Module internal fault or failed processor/stack in the HV powertrain controller
- Vehicle battery/12V undervoltage or intermittent charging system
- Software version mismatch between modules after service or update
Fault status
Status
Module received invalid or corrupted data from the Hybrid/EV Powertrain Control Module. May cause loss of hybrid/EV functions, reduced performance or limp-home mode. Check communications, wiring, module power/grounds and software.
Repair difficulty: Medium
Diagnostic time: 1.0 - 4.0 hours
Similar codes
Workshop Manuals
Available brands with manuals
2
AUDI 11
6-speed manual gearbox 0B1, front-wheel drive — Workshop Manual (Edition 05.2014)
Workshop Manual199,00 UAH
Audi A3 (1997) – 1.6L 4-cylinder (2‑valve) Engine Mechanical Components Service Manual (AEH, AKL, APF) – Edition 07.2002
Workshop Manual199,00 UAH
AUDI A3 (2004) Workshop Manual — 2.0L FSI Turbo (4‑cyl, 4‑valve) Engine, Mechanics — Edition 03.2017
Workshop Manual199,00 UAH
Audi A3 2004 — Electrical System (Workshop Manual, Edition 02.2018)
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet – 4.2 l V8 (5‑valve, timing chains) – Workshop Manual (Mechanics) – Edition 04.2007
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet — Auxiliary Heater Workshop Manual (Edition 08.2004)
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet (1.8T 4‑cyl turbo) — Motronic Injection & Ignition System Service Manual (Edition 01.2015)
Workshop Manual199,00 UAH
Audi A8 (2003) — Electrical System Workshop Manual (Edition 08.2014)
Workshop Manual199,00 UAH
Audi Q4 e-tron (Type F4) - Self-study Programme SSP 685
Workshop Manual199,00 UAH
Audi Q8 (2018) — Electrical System Workshop Manual (Edition 05.2019)
Workshop Manual199,00 UAH
Audi Servicing Manual — 7‑Speed Dual Clutch Transmission 0CJ / 0CL / 0CK / 0DN / 0DP / 0HL (Edition 05.2018)
Workshop Manual199,00 UAH
LAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
U0594
HYUNDAI
U — Network/User
Invalid Data Received From Hybrid Powertrain Control Module
Views:
UK: 15
EN: 45
RU: 24
AI status
Completed
Completed
100%
Causes
- Corrupted CAN/CAN-FD or LIN messages from the Hybrid/EV Powertrain Control Module
- Faulty or intermittent wiring, connectors, grounds or shield on the network carrying HV powertrain messages
- Failed or failing Hybrid/EV Powertrain Control Module (inverter, PTC/PCM-like HV controller)
- Low or unstable 12 V supply, low battery, or poor ground affecting module operation
- Missing or incorrect software calibration or firmware mismatch after module replacement or update
- Bad termination, bus short to battery/ground, or electrical noise/EMI on the data bus
Symptoms
- MIL/onboard warning light illuminated (Check Hybrid/EV System, Service Electric)
- Reduced engine/motor power, limited performance or limp-home mode
- Hybrid/EV functions disabled or limited (no regenerative braking, no EV drive)
- Loss of charging or vehicle refuses to charge (depending on design)
- Multiple related DTCs stored in other network modules
- Intermittent or persistent driveability faults correlated with vehicle speed/load
What to check
- Use OEM-capable scan tool to read U0594 and all related codes and freeze-frame data
- Check for other U0xxx or CAN bus errors in BCM, ECM, TCM, ABS, charger, or inverter modules
- Verify 12 V battery voltage and state during fault occurrence (stable >12.2 V at key on/load)
- Visually inspect connectors, harnesses and shielding at the Hybrid/EV Powertrain Control Module and associated junctions
- Check CAN/CAN-FD bus idle voltages and differential with a multimeter/oscilloscope (each line ~2.5 V; proper dominant and recessive waveforms; termination ~60 Ω across bus)
- Inspect fuses, relays and HV interlocks that supply or enable the module
Signal parameters
- HV Battery Pack Status: state of charge (SOC) 0–100% (should be plausible for driving condition)
- HV Pack Voltage: vehicle-specific (example range 200–800 V depending on vehicle) — should be within manufacturer spec
- Pack Current/Charge Current: negative/positive values within expected amperage range for conditions
- Inverter/Motor Status Flags: enabled/disabled, fault bits — should not be reporting invalid codes
- DC-DC Converter Status: enabled/disabled and output 12 V system voltage ~13–14.5 V when running
- CAN/CAN-FD bus voltage: CAN_H and CAN_L idle ≈2.5 V each; differential and dominant levels observed on scope
Diagnostic algorithm
- Record freeze-frame and full set of codes with an OEM scan tool; note time, SOC, and vehicle conditions when the code set.
- Attempt to reproduce the fault while monitoring real-time data for HV pack voltage, SOC, inverter status and related messages.
- Check for accompanying network errors (bus-off, timeouts, other U-codes). If bus errors present, focus on wiring/termination.
- Visually inspect connectors, pins and shielding at the hybrid/EV powertrain module, inverter, battery management unit and related harnesses; repair corrosion, bent pins, or damage.
- Measure CAN/CAN-FD bus voltages and use an oscilloscope to verify message integrity, voltage levels and termination (look for noise, missing messages, or corrupted frames).
- Verify 12 V supply and grounds to the hybrid/EV powertrain module under load; repair poor battery/ground connections or replace weak battery.
- Check and replace blown fuses, relays or interlocks that could cause intermittent module resets or invalid data.
- If wiring and bus integrity are good but invalid data persists, check for correct software/firmware levels; perform reprogramming or software update per manufacturer instructions.
- If software update does not clear invalid-data condition, bench-test or replace the affected Hybrid/EV Powertrain Control Module following OEM procedures and reprogram as required.
- After repairs, clear DTCs, perform a road test under the conditions that produced the code, and confirm no reappearance. Re-scan all modules for related faults.
Likely causes
- Loose/corroded connector or pin at the hybrid/EV powertrain module
- CAN bus wiring damage (chafing, water intrusion, pinched shield)
- Module internal fault or failed processor/stack in the HV powertrain controller
- Vehicle battery/12V undervoltage or intermittent charging system
- Software version mismatch between modules after service or update
Fault status
Status
Module received invalid or corrupted data from the Hybrid/EV Powertrain Control Module. May cause loss of hybrid/EV functions, reduced performance or limp-home mode. Check communications, wiring, module power/grounds and software.
Repair difficulty: Medium
Diagnostic time: 1.0 - 4.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
U0594
LAND ROVER
U — Network/User
Invalid data received from the hybrid control module of the powertrain
Views:
UK: 12
EN: 6
RU: 13
AI status
Completed
Completed
100%
Causes
- Corrupted CAN/CAN-FD or LIN messages from the Hybrid/EV Powertrain Control Module
- Faulty or intermittent wiring, connectors, grounds or shield on the network carrying HV powertrain messages
- Failed or failing Hybrid/EV Powertrain Control Module (inverter, PTC/PCM-like HV controller)
- Low or unstable 12 V supply, low battery, or poor ground affecting module operation
- Missing or incorrect software calibration or firmware mismatch after module replacement or update
- Bad termination, bus short to battery/ground, or electrical noise/EMI on the data bus
Symptoms
- MIL/onboard warning light illuminated (Check Hybrid/EV System, Service Electric)
- Reduced engine/motor power, limited performance or limp-home mode
- Hybrid/EV functions disabled or limited (no regenerative braking, no EV drive)
- Loss of charging or vehicle refuses to charge (depending on design)
- Multiple related DTCs stored in other network modules
- Intermittent or persistent driveability faults correlated with vehicle speed/load
What to check
- Use OEM-capable scan tool to read U0594 and all related codes and freeze-frame data
- Check for other U0xxx or CAN bus errors in BCM, ECM, TCM, ABS, charger, or inverter modules
- Verify 12 V battery voltage and state during fault occurrence (stable >12.2 V at key on/load)
- Visually inspect connectors, harnesses and shielding at the Hybrid/EV Powertrain Control Module and associated junctions
- Check CAN/CAN-FD bus idle voltages and differential with a multimeter/oscilloscope (each line ~2.5 V; proper dominant and recessive waveforms; termination ~60 Ω across bus)
- Inspect fuses, relays and HV interlocks that supply or enable the module
Signal parameters
- HV Battery Pack Status: state of charge (SOC) 0–100% (should be plausible for driving condition)
- HV Pack Voltage: vehicle-specific (example range 200–800 V depending on vehicle) — should be within manufacturer spec
- Pack Current/Charge Current: negative/positive values within expected amperage range for conditions
- Inverter/Motor Status Flags: enabled/disabled, fault bits — should not be reporting invalid codes
- DC-DC Converter Status: enabled/disabled and output 12 V system voltage ~13–14.5 V when running
- CAN/CAN-FD bus voltage: CAN_H and CAN_L idle ≈2.5 V each; differential and dominant levels observed on scope
Diagnostic algorithm
- Record freeze-frame and full set of codes with an OEM scan tool; note time, SOC, and vehicle conditions when the code set.
- Attempt to reproduce the fault while monitoring real-time data for HV pack voltage, SOC, inverter status and related messages.
- Check for accompanying network errors (bus-off, timeouts, other U-codes). If bus errors present, focus on wiring/termination.
- Visually inspect connectors, pins and shielding at the hybrid/EV powertrain module, inverter, battery management unit and related harnesses; repair corrosion, bent pins, or damage.
- Measure CAN/CAN-FD bus voltages and use an oscilloscope to verify message integrity, voltage levels and termination (look for noise, missing messages, or corrupted frames).
- Verify 12 V supply and grounds to the hybrid/EV powertrain module under load; repair poor battery/ground connections or replace weak battery.
- Check and replace blown fuses, relays or interlocks that could cause intermittent module resets or invalid data.
- If wiring and bus integrity are good but invalid data persists, check for correct software/firmware levels; perform reprogramming or software update per manufacturer instructions.
- If software update does not clear invalid-data condition, bench-test or replace the affected Hybrid/EV Powertrain Control Module following OEM procedures and reprogram as required.
- After repairs, clear DTCs, perform a road test under the conditions that produced the code, and confirm no reappearance. Re-scan all modules for related faults.
Likely causes
- Loose/corroded connector or pin at the hybrid/EV powertrain module
- CAN bus wiring damage (chafing, water intrusion, pinched shield)
- Module internal fault or failed processor/stack in the HV powertrain controller
- Vehicle battery/12V undervoltage or intermittent charging system
- Software version mismatch between modules after service or update
Fault status
Status
Module received invalid or corrupted data from the Hybrid/EV Powertrain Control Module. May cause loss of hybrid/EV functions, reduced performance or limp-home mode. Check communications, wiring, module power/grounds and software.
Repair difficulty: Medium
Diagnostic time: 1.0 - 4.0 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email