Code
U0423
Generic
U — Network/User
Invalid Data Received From Instrument Panel Cluster Control Module
Views:
UK: 34
EN: 58
RU: 75
AI status
Completed
Completed
100%
Causes
- Instrument Panel Cluster (IPC) sending corrupted or out-of-spec messages
- Loss or corruption of CAN/LIN bus communication
- Damaged wiring, chafed insulation, corroded or loose connectors between IPC and other modules
- Bad ground or supply voltage to the IPC
- Incorrect or mismatched IPC programming/calibration (software version mismatch)
- Faulty receiving module interpreting IPC data incorrectly
Symptoms
- Illumination of dash warning lamps or incorrect lamp status
- Inoperative or erratic gauges (speedometer, tachometer, fuel, etc.)
- Multiple communication-related trouble codes present
- Intermittent loss of instrument cluster functionality
- Possible loss of features that rely on IPC data (e.g., vehicle speed signal)
What to check
- Read all stored and pending DTCs from all modules; record freeze-frame data and timestamps
- Verify battery voltage and charging system health before testing communications
- Visually inspect IPC connectors and wiring harness for damage, corrosion, or looseness
- Check for additional U-, B- or C-codes that indicate bus or power/ground faults
- Scan the vehicle network to confirm IPC messages are present and periodic
- Attempt to clear the code and see if it returns; note conditions when it reappears
Signal parameters
- IPC CAN/LIN message presence (message IDs as OEM-specific; messages should be periodic)
- Message frequency/period (typical IPC messages: ~50–200 ms depending on vehicle)
- Data bytes expected ranges: vehicle speed, engine RPM, odometer, fuel level, lamp statuses
- Sequence counter and checksum fields (if used) should increment/validate correctly
- Physical layer voltages: CANH/CANL at idle ≈ 2.5 V, differential ≈ 0 V (recessive); dominant when active
- Bus termination: total resistance between CANH and CANL ≈ 60 ohms (two 120Ω in parallel)
Diagnostic algorithm
- Connect a capable scan tool and retrieve all modules' DTCs and freeze-frame. Note any other network-related codes.
- Inspect IPC power and ground circuits; verify battery voltage while cranking and at key-on. Repair any low voltage or poor ground issues.
- Visually inspect and gently wiggle IPC connectors and related harnesses while monitoring the network for message loss or code set.
- Use the scan tool to monitor IPC CAN/LIN messages. Confirm messages exist, are periodic, and that reported data values are within expected ranges.
- If messages are missing or malformed, use a digital oscilloscope or CAN bus analyzer to check CANH/CANL waveforms for noise, missing termination, or reflections.
- Check termination resistance across CANH and CANL. Repair or replace failed termination resistors or modules causing termination issues.
- If wiring and physical layer check good, verify IPC software/calibration matches vehicle build. Reprogram or update IPC software per OEM procedures if required.
- If invalid data persists and all power, ground, wiring, and software are verified, consider replacing the IPC and reprogramming/configuring it. Confirm repair by clearing codes and performing road test while monitoring messages.
- After repair, re-scan all modules and perform a functional verification of affected features.
Likely causes
- Corrupted CAN/LIN messages from the IPC (bad module or internal fault)
- Wiring or connector fault on the IPC network (open/short/intermittent)
- Power/ground problem at the IPC causing invalid transmissions
- Module software/calibration mismatch after replacement or update
- Bus termination or physical layer fault (missing/failed termination resistor, short on bus)
Fault status
Status
Invalid Data Received From Instrument Panel Cluster (IPC) Control Module — module reported malformed or out-of-range data on the vehicle network.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
U0423
HYUNDAI
U — Network/User
Invalid Data Received From Instrument Panel Control Module
Views:
UK: 20
EN: 23
RU: 58
AI status
Completed
Completed
100%
Causes
- Instrument Panel Cluster (IPC) sending corrupted or out-of-spec messages
- Loss or corruption of CAN/LIN bus communication
- Damaged wiring, chafed insulation, corroded or loose connectors between IPC and other modules
- Bad ground or supply voltage to the IPC
- Incorrect or mismatched IPC programming/calibration (software version mismatch)
- Faulty receiving module interpreting IPC data incorrectly
Symptoms
- Illumination of dash warning lamps or incorrect lamp status
- Inoperative or erratic gauges (speedometer, tachometer, fuel, etc.)
- Multiple communication-related trouble codes present
- Intermittent loss of instrument cluster functionality
- Possible loss of features that rely on IPC data (e.g., vehicle speed signal)
What to check
- Read all stored and pending DTCs from all modules; record freeze-frame data and timestamps
- Verify battery voltage and charging system health before testing communications
- Visually inspect IPC connectors and wiring harness for damage, corrosion, or looseness
- Check for additional U-, B- or C-codes that indicate bus or power/ground faults
- Scan the vehicle network to confirm IPC messages are present and periodic
- Attempt to clear the code and see if it returns; note conditions when it reappears
Signal parameters
- IPC CAN/LIN message presence (message IDs as OEM-specific; messages should be periodic)
- Message frequency/period (typical IPC messages: ~50–200 ms depending on vehicle)
- Data bytes expected ranges: vehicle speed, engine RPM, odometer, fuel level, lamp statuses
- Sequence counter and checksum fields (if used) should increment/validate correctly
- Physical layer voltages: CANH/CANL at idle ≈ 2.5 V, differential ≈ 0 V (recessive); dominant when active
- Bus termination: total resistance between CANH and CANL ≈ 60 ohms (two 120Ω in parallel)
Diagnostic algorithm
- Connect a capable scan tool and retrieve all modules' DTCs and freeze-frame. Note any other network-related codes.
- Inspect IPC power and ground circuits; verify battery voltage while cranking and at key-on. Repair any low voltage or poor ground issues.
- Visually inspect and gently wiggle IPC connectors and related harnesses while monitoring the network for message loss or code set.
- Use the scan tool to monitor IPC CAN/LIN messages. Confirm messages exist, are periodic, and that reported data values are within expected ranges.
- If messages are missing or malformed, use a digital oscilloscope or CAN bus analyzer to check CANH/CANL waveforms for noise, missing termination, or reflections.
- Check termination resistance across CANH and CANL. Repair or replace failed termination resistors or modules causing termination issues.
- If wiring and physical layer check good, verify IPC software/calibration matches vehicle build. Reprogram or update IPC software per OEM procedures if required.
- If invalid data persists and all power, ground, wiring, and software are verified, consider replacing the IPC and reprogramming/configuring it. Confirm repair by clearing codes and performing road test while monitoring messages.
- After repair, re-scan all modules and perform a functional verification of affected features.
Likely causes
- Corrupted CAN/LIN messages from the IPC (bad module or internal fault)
- Wiring or connector fault on the IPC network (open/short/intermittent)
- Power/ground problem at the IPC causing invalid transmissions
- Module software/calibration mismatch after replacement or update
- Bus termination or physical layer fault (missing/failed termination resistor, short on bus)
Fault status
Status
Invalid Data Received From Instrument Panel Cluster (IPC) Control Module — module reported malformed or out-of-range data on the vehicle network.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
U0423
LAND ROVER
U — Network/User
Invalid data received from the instrument panel control module
Views:
UK: 8
EN: 11
RU: 38
AI status
Completed
Completed
100%
Causes
- Instrument Panel Cluster (IPC) sending corrupted or out-of-spec messages
- Loss or corruption of CAN/LIN bus communication
- Damaged wiring, chafed insulation, corroded or loose connectors between IPC and other modules
- Bad ground or supply voltage to the IPC
- Incorrect or mismatched IPC programming/calibration (software version mismatch)
- Faulty receiving module interpreting IPC data incorrectly
Symptoms
- Illumination of dash warning lamps or incorrect lamp status
- Inoperative or erratic gauges (speedometer, tachometer, fuel, etc.)
- Multiple communication-related trouble codes present
- Intermittent loss of instrument cluster functionality
- Possible loss of features that rely on IPC data (e.g., vehicle speed signal)
What to check
- Read all stored and pending DTCs from all modules; record freeze-frame data and timestamps
- Verify battery voltage and charging system health before testing communications
- Visually inspect IPC connectors and wiring harness for damage, corrosion, or looseness
- Check for additional U-, B- or C-codes that indicate bus or power/ground faults
- Scan the vehicle network to confirm IPC messages are present and periodic
- Attempt to clear the code and see if it returns; note conditions when it reappears
Signal parameters
- IPC CAN/LIN message presence (message IDs as OEM-specific; messages should be periodic)
- Message frequency/period (typical IPC messages: ~50–200 ms depending on vehicle)
- Data bytes expected ranges: vehicle speed, engine RPM, odometer, fuel level, lamp statuses
- Sequence counter and checksum fields (if used) should increment/validate correctly
- Physical layer voltages: CANH/CANL at idle ≈ 2.5 V, differential ≈ 0 V (recessive); dominant when active
- Bus termination: total resistance between CANH and CANL ≈ 60 ohms (two 120Ω in parallel)
Diagnostic algorithm
- Connect a capable scan tool and retrieve all modules' DTCs and freeze-frame. Note any other network-related codes.
- Inspect IPC power and ground circuits; verify battery voltage while cranking and at key-on. Repair any low voltage or poor ground issues.
- Visually inspect and gently wiggle IPC connectors and related harnesses while monitoring the network for message loss or code set.
- Use the scan tool to monitor IPC CAN/LIN messages. Confirm messages exist, are periodic, and that reported data values are within expected ranges.
- If messages are missing or malformed, use a digital oscilloscope or CAN bus analyzer to check CANH/CANL waveforms for noise, missing termination, or reflections.
- Check termination resistance across CANH and CANL. Repair or replace failed termination resistors or modules causing termination issues.
- If wiring and physical layer check good, verify IPC software/calibration matches vehicle build. Reprogram or update IPC software per OEM procedures if required.
- If invalid data persists and all power, ground, wiring, and software are verified, consider replacing the IPC and reprogramming/configuring it. Confirm repair by clearing codes and performing road test while monitoring messages.
- After repair, re-scan all modules and perform a functional verification of affected features.
Likely causes
- Corrupted CAN/LIN messages from the IPC (bad module or internal fault)
- Wiring or connector fault on the IPC network (open/short/intermittent)
- Power/ground problem at the IPC causing invalid transmissions
- Module software/calibration mismatch after replacement or update
- Bus termination or physical layer fault (missing/failed termination resistor, short on bus)
Fault status
Status
Invalid Data Received From Instrument Panel Cluster (IPC) Control Module — module reported malformed or out-of-range data on the vehicle network.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 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.
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0
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