Code
U0588
Generic
U — Network/User
Invalid Data Received From Transmission Fluid Pump Module A
AI status
Completed
Completed
100%
Causes
- Faulty Transmission Fluid Pump Module A (hardware or firmware)
- Open, shorted, damaged or corroded wiring/connectors between module and network
- Poor or missing power supply or ground to the pump module
- CAN/LIN bus faults (missing termination, low/high voltage, interference)
- Intermittent connector contact or water intrusion
- Software mismatch or corrupted calibration in module or other controllers
Symptoms
- Transmission warning or MIL illuminated
- Transmission may go into limp mode or have restricted functionality
- Incorrect or no pump operation (reduced cooling/pressure)
- Abnormal shifting or harsh shifts
- Stored and/or repeated communication fault codes
What to check
- Read all related U- and P-codes and freeze frame/store data with a capable scan tool
- Verify the pump module appears on the network (module present in scan tool list)
- Visual inspection of connectors and harness for damage, corrosion, or water intrusion
- Check module 12V supply and ground voltages at the module connector
- Check CAN/LIN bus voltages and activity with a DVOM or oscilloscope
- Wiggle/pressure test wiring harness while monitoring live data for intermittent faults
Signal parameters
- Module supply voltage: ~12 V (check for battery voltage at key-on and running)
- Module ground: near 0 V (low resistance to chassis ground)
- CAN bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (recessive); dominant typically CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V
- Typical CAN bus data rates: commonly 250 kbps or 500 kbps depending on vehicle
- Module messages: periodic status/telemetry packets (expected regular interval; absence or corrupted payload flags fault)
- Checksum/CRC or counter fields present in messages — invalid or out-of-range values indicate corrupted data
Diagnostic algorithm
- Retrieve and record all current and historic DTCs, freeze frame and live data for the pump module and related controllers.
- Clear codes and attempt to reproduce the fault with the engine and transmission at normal operating conditions.
- Confirm the pump module is present on the vehicle network using a scan tool; note whether it responds to requests and shows valid parameters.
- Perform a visual inspection of the module connector and harness; repair any corrosion, bent pins, or physical damage.
- Backprobe the module connector and verify key-on and running power and ground with a DVOM; repair any supply issues.
- Monitor CAN bus voltages and signal integrity with an oscilloscope at the module connector while operating; verify correct idle levels and message activity.
- If the bus looks unhealthy, isolate segments (disconnect the module) and test for bus termination or a short to battery/ground.
- Wiggle the harness and connectors while monitoring live data to find intermittent faults.
- If wiring and power/ground are good and communications are still invalid, check for and apply any available software updates or reflash the pump module and vehicle controllers per manufacturer procedures.
- If software update and diagnostics do not restore valid data, replace the Transmission Fluid Pump Module A and re-test. After repair, erase codes and verify normal operation and no reoccurrence.
Likely causes
- Damaged connector or wiring to the pump module
- Module lost power or ground intermittently
- CAN bus voltage out of range (bus off, missing termination)
- Faulty pump module firmware or internal failure
Fault status
Status
Invalid data received from Transmission Fluid Pump Module A. The module is not sending valid communication or its messages are corrupted. This can affect transmission cooling/pressure control and may require wiring, module, or software repair.
Repair difficulty: Medium
Diagnostic time: 1.0-4.0 hours
Similar codes
Repair manuals
Brands with available manuals
9,357
The library contains 9,357 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.
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
U0588
HYUNDAI
U — Network/User
Invalid Data Received From Transmission Fluid Pump Module
AI status
Completed
Completed
100%
Causes
- Faulty Transmission Fluid Pump Module A (hardware or firmware)
- Open, shorted, damaged or corroded wiring/connectors between module and network
- Poor or missing power supply or ground to the pump module
- CAN/LIN bus faults (missing termination, low/high voltage, interference)
- Intermittent connector contact or water intrusion
- Software mismatch or corrupted calibration in module or other controllers
Symptoms
- Transmission warning or MIL illuminated
- Transmission may go into limp mode or have restricted functionality
- Incorrect or no pump operation (reduced cooling/pressure)
- Abnormal shifting or harsh shifts
- Stored and/or repeated communication fault codes
What to check
- Read all related U- and P-codes and freeze frame/store data with a capable scan tool
- Verify the pump module appears on the network (module present in scan tool list)
- Visual inspection of connectors and harness for damage, corrosion, or water intrusion
- Check module 12V supply and ground voltages at the module connector
- Check CAN/LIN bus voltages and activity with a DVOM or oscilloscope
- Wiggle/pressure test wiring harness while monitoring live data for intermittent faults
Signal parameters
- Module supply voltage: ~12 V (check for battery voltage at key-on and running)
- Module ground: near 0 V (low resistance to chassis ground)
- CAN bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (recessive); dominant typically CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V
- Typical CAN bus data rates: commonly 250 kbps or 500 kbps depending on vehicle
- Module messages: periodic status/telemetry packets (expected regular interval; absence or corrupted payload flags fault)
- Checksum/CRC or counter fields present in messages — invalid or out-of-range values indicate corrupted data
Diagnostic algorithm
- Retrieve and record all current and historic DTCs, freeze frame and live data for the pump module and related controllers.
- Clear codes and attempt to reproduce the fault with the engine and transmission at normal operating conditions.
- Confirm the pump module is present on the vehicle network using a scan tool; note whether it responds to requests and shows valid parameters.
- Perform a visual inspection of the module connector and harness; repair any corrosion, bent pins, or physical damage.
- Backprobe the module connector and verify key-on and running power and ground with a DVOM; repair any supply issues.
- Monitor CAN bus voltages and signal integrity with an oscilloscope at the module connector while operating; verify correct idle levels and message activity.
- If the bus looks unhealthy, isolate segments (disconnect the module) and test for bus termination or a short to battery/ground.
- Wiggle the harness and connectors while monitoring live data to find intermittent faults.
- If wiring and power/ground are good and communications are still invalid, check for and apply any available software updates or reflash the pump module and vehicle controllers per manufacturer procedures.
- If software update and diagnostics do not restore valid data, replace the Transmission Fluid Pump Module A and re-test. After repair, erase codes and verify normal operation and no reoccurrence.
Likely causes
- Damaged connector or wiring to the pump module
- Module lost power or ground intermittently
- CAN bus voltage out of range (bus off, missing termination)
- Faulty pump module firmware or internal failure
Fault status
Status
Invalid data received from Transmission Fluid Pump Module A. The module is not sending valid communication or its messages are corrupted. This can affect transmission cooling/pressure control and may require wiring, module, or software repair.
Repair difficulty: Medium
Diagnostic time: 1.0-4.0 hours
Similar codes
Repair manuals
Manual library for HYUNDAI
371
Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
HYUNDAI
-
HYUNDAI: 2023
-
Elantra
-
Elantra N
-
Kona N
-
Tucson
- Hybrid Blue
- Hybrid Limited
- Hybrid SEL Convenience
- Limited, Eng CD G4EN, 4WD
- Limited, Eng CD G4EN, FWD
- Limited, Eng CD G4KN, 4WD
- Limited, Eng CD G4KN, FWD
- N Line, Eng CD G4EN, 4WD
- N Line, Eng CD G4EN, FWD
- N Line, Eng CD G4KN, 4WD
- N Line, Eng CD G4KN, FWD
- Plug-In Hybrid Limited
- Plug-In Hybrid SEL
- SE, Eng CD G4EN, 4WD
- SE, Eng CD G4EN, FWD
- SE, Eng CD G4KN, 4WD
- SE, Eng CD G4KN, FWD
- SEL, Eng CD G4EN, 4WD
- SEL, Eng CD G4EN, FWD
- SEL, Eng CD G4KN, 4WD
- SEL, Eng CD G4KN, FWD
- XRT, Eng CD G4EN, 4WD
- XRT, Eng CD G4EN, FWD
- XRT, Eng CD G4KN, 4WD
- XRT, Eng CD G4KN, FWD
-
-
HYUNDAI: 2022
-
Elantra N
-
Kona N
-
Veloster N
-
HYUNDAI: 2021
-
Veloster N
-
HYUNDAI: 2020
-
Palisade
-
Veloster N
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