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Home / DTC / U2108 — Invalid Data Received From Vehicle Network Node

U2108 — Invalid Data Received From Vehicle Network Node

Detailed page for trouble code U2108.

34,413codes
59brands
11,922generic
22,491specific
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Code

U2108

HUMMER U — Network/User

Invalid Data Received From Vehicle Network Node

Brand: HUMMER
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty or misbehaving control module sending corrupted/invalid messages
  • Wiring harness damage, intermittent connector, or poor pin contact at a module
  • CAN/LIN bus electrical problem (short to battery/ground, open, incorrect termination)
  • Software bug, incorrect module configuration, or failed module flash/update
  • Voltage supply or ground problem at the network node
  • Electromagnetic interference or improper after-market device on the bus

Symptoms

  • Malfunction Indicator Lamp (MIL) or message lamp illuminated
  • Loss or intermittent operation of functions controlled by the affected node (e.g., instrument cluster, BCM, ABS, transaxle)
  • Erratic gauges, warning messages, or module-specific failures
  • One or more modules showing communication or timeout errors on a scan tool
  • Possible vehicle performance or drivability issues if a critical node is affected

What to check

  • Read all U-codes and manufacturer-specific codes with a capable scan tool; record freeze frame and live data
  • Inspect wiring and connectors for the suspected node: corrosion, bent pins, heat damage or chafe points
  • Check module power and ground circuits for correct voltages and good ground connections
  • Measure CAN/LIN bus idle voltages and termination resistance (see signal parameters)
  • Check for recent repairs, aftermarket devices or modifications connected to vehicle networks
  • Attempt to reproduce the fault; note conditions (key on, engine running, driving, accessory use)

Signal parameters

  • CAN bus recessive idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (both near mid-supply)
  • CAN dominant state: CAN_H ≈ 3.5 V and CAN_L ≈ 1.5 V (differential ≈ 2 V)
  • Differential bus voltage (dominant) roughly 1.5–3.5 V; no shorts to battery or ground expected
  • Termination resistance between CAN_H and CAN_L ≈ 60 ohms (two 120 Ω resistors in parallel)
  • Message parameters: look for unexpected message IDs, incorrect payload length, malformed CRC/checksum, or anomalous timing/periodicity
  • LIN typical voltage levels: master ~12V pulsed, bus idle near ground via pull-down (refer to vehicle spec)

Diagnostic algorithm

  1. Connect a manufacturer-capable scan tool, retrieve and record all DTCs and freeze frame data. Note the module(s) reporting U2108.
  2. Clear codes and attempt to re-create the condition to confirm reproducibility and capture live data.
  3. Visual inspection: check connectors and wiring for the affected node(s) — secure connections, damaged insulation, corrosion, or loose pins.
  4. Verify that the affected module has proper supply and ground voltages with key ON and engine running as required by the vehicle.
  5. Measure termination resistance across CAN_H and CAN_L with battery disconnected; expect ~60 Ω. Inspect for unintended shorts to battery or ground.
  6. Using a digital multimeter and preferably an oscilloscope or CAN/LIN analyzer, observe bus voltages and waveform integrity while operating the vehicle or repeating the fault. Look for corrupted frames, bus-off events, or noise.
  7. If a specific message ID or node is identified as sending invalid data, isolate that module by disconnecting it (if safe and permitted) and observe if the code clears or changes.
  8. Check for and apply any manufacturer software updates or reflash procedures for the implicated module(s). Reprogram or reconfigure module coding if improper coding is suspected after replacement.
  9. If all wiring, power/ground and software are verified good and the module still sends invalid data, consider replacing the malfunctioning control module per manufacturer procedure.
  10. After repair, clear codes, retest under the original conditions, and confirm that the fault does not return. Document findings and repairs.

Likely causes

  • Defective module transmitting malformed frames or incorrect message contents
  • Damaged connector or chafed wiring on CAN/LIN high or low lines near the reported node
  • Missing or failed termination resistor(s) causing corrupted bus signals
  • Recent module replacement or software update with incorrect calibration or coding
  • Low or noisy supply/ground at the node causing data corruption

Fault status

⚠️ Status
Invalid data was received from a network node. The receiving module detected malformed or unexpected message content, timing, or checksum on the vehicle communication bus. This indicates a communication or data integrity problem that requires inspection of the node, wiring, bus integrity, and software.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

U0100 U0073 U0121 U0199 U0155
Repair manuals

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Code

U2108

LAND ROVER U — Network/User

Invalid Data Received from Control Module

Brand: LAND ROVER
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty or misbehaving control module sending corrupted/invalid messages
  • Wiring harness damage, intermittent connector, or poor pin contact at a module
  • CAN/LIN bus electrical problem (short to battery/ground, open, incorrect termination)
  • Software bug, incorrect module configuration, or failed module flash/update
  • Voltage supply or ground problem at the network node
  • Electromagnetic interference or improper after-market device on the bus

Symptoms

  • Malfunction Indicator Lamp (MIL) or message lamp illuminated
  • Loss or intermittent operation of functions controlled by the affected node (e.g., instrument cluster, BCM, ABS, transaxle)
  • Erratic gauges, warning messages, or module-specific failures
  • One or more modules showing communication or timeout errors on a scan tool
  • Possible vehicle performance or drivability issues if a critical node is affected

What to check

  • Read all U-codes and manufacturer-specific codes with a capable scan tool; record freeze frame and live data
  • Inspect wiring and connectors for the suspected node: corrosion, bent pins, heat damage or chafe points
  • Check module power and ground circuits for correct voltages and good ground connections
  • Measure CAN/LIN bus idle voltages and termination resistance (see signal parameters)
  • Check for recent repairs, aftermarket devices or modifications connected to vehicle networks
  • Attempt to reproduce the fault; note conditions (key on, engine running, driving, accessory use)

Signal parameters

  • CAN bus recessive idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (both near mid-supply)
  • CAN dominant state: CAN_H ≈ 3.5 V and CAN_L ≈ 1.5 V (differential ≈ 2 V)
  • Differential bus voltage (dominant) roughly 1.5–3.5 V; no shorts to battery or ground expected
  • Termination resistance between CAN_H and CAN_L ≈ 60 ohms (two 120 Ω resistors in parallel)
  • Message parameters: look for unexpected message IDs, incorrect payload length, malformed CRC/checksum, or anomalous timing/periodicity
  • LIN typical voltage levels: master ~12V pulsed, bus idle near ground via pull-down (refer to vehicle spec)

Diagnostic algorithm

  1. Connect a manufacturer-capable scan tool, retrieve and record all DTCs and freeze frame data. Note the module(s) reporting U2108.
  2. Clear codes and attempt to re-create the condition to confirm reproducibility and capture live data.
  3. Visual inspection: check connectors and wiring for the affected node(s) — secure connections, damaged insulation, corrosion, or loose pins.
  4. Verify that the affected module has proper supply and ground voltages with key ON and engine running as required by the vehicle.
  5. Measure termination resistance across CAN_H and CAN_L with battery disconnected; expect ~60 Ω. Inspect for unintended shorts to battery or ground.
  6. Using a digital multimeter and preferably an oscilloscope or CAN/LIN analyzer, observe bus voltages and waveform integrity while operating the vehicle or repeating the fault. Look for corrupted frames, bus-off events, or noise.
  7. If a specific message ID or node is identified as sending invalid data, isolate that module by disconnecting it (if safe and permitted) and observe if the code clears or changes.
  8. Check for and apply any manufacturer software updates or reflash procedures for the implicated module(s). Reprogram or reconfigure module coding if improper coding is suspected after replacement.
  9. If all wiring, power/ground and software are verified good and the module still sends invalid data, consider replacing the malfunctioning control module per manufacturer procedure.
  10. After repair, clear codes, retest under the original conditions, and confirm that the fault does not return. Document findings and repairs.

Likely causes

  • Defective module transmitting malformed frames or incorrect message contents
  • Damaged connector or chafed wiring on CAN/LIN high or low lines near the reported node
  • Missing or failed termination resistor(s) causing corrupted bus signals
  • Recent module replacement or software update with incorrect calibration or coding
  • Low or noisy supply/ground at the node causing data corruption

Fault status

⚠️ Status
Invalid data was received from a network node. The receiving module detected malformed or unexpected message content, timing, or checksum on the vehicle communication bus. This indicates a communication or data integrity problem that requires inspection of the node, wiring, bus integrity, and software.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

U0100 U0073 U0121 U0199 U0155
413

Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

U2108

OPEL U — Network/User

CAN-Bus no Communication with ABS/TC

Brand: OPEL
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty or misbehaving control module sending corrupted/invalid messages
  • Wiring harness damage, intermittent connector, or poor pin contact at a module
  • CAN/LIN bus electrical problem (short to battery/ground, open, incorrect termination)
  • Software bug, incorrect module configuration, or failed module flash/update
  • Voltage supply or ground problem at the network node
  • Electromagnetic interference or improper after-market device on the bus

Symptoms

  • Malfunction Indicator Lamp (MIL) or message lamp illuminated
  • Loss or intermittent operation of functions controlled by the affected node (e.g., instrument cluster, BCM, ABS, transaxle)
  • Erratic gauges, warning messages, or module-specific failures
  • One or more modules showing communication or timeout errors on a scan tool
  • Possible vehicle performance or drivability issues if a critical node is affected

What to check

  • Read all U-codes and manufacturer-specific codes with a capable scan tool; record freeze frame and live data
  • Inspect wiring and connectors for the suspected node: corrosion, bent pins, heat damage or chafe points
  • Check module power and ground circuits for correct voltages and good ground connections
  • Measure CAN/LIN bus idle voltages and termination resistance (see signal parameters)
  • Check for recent repairs, aftermarket devices or modifications connected to vehicle networks
  • Attempt to reproduce the fault; note conditions (key on, engine running, driving, accessory use)

Signal parameters

  • CAN bus recessive idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (both near mid-supply)
  • CAN dominant state: CAN_H ≈ 3.5 V and CAN_L ≈ 1.5 V (differential ≈ 2 V)
  • Differential bus voltage (dominant) roughly 1.5–3.5 V; no shorts to battery or ground expected
  • Termination resistance between CAN_H and CAN_L ≈ 60 ohms (two 120 Ω resistors in parallel)
  • Message parameters: look for unexpected message IDs, incorrect payload length, malformed CRC/checksum, or anomalous timing/periodicity
  • LIN typical voltage levels: master ~12V pulsed, bus idle near ground via pull-down (refer to vehicle spec)

Diagnostic algorithm

  1. Connect a manufacturer-capable scan tool, retrieve and record all DTCs and freeze frame data. Note the module(s) reporting U2108.
  2. Clear codes and attempt to re-create the condition to confirm reproducibility and capture live data.
  3. Visual inspection: check connectors and wiring for the affected node(s) — secure connections, damaged insulation, corrosion, or loose pins.
  4. Verify that the affected module has proper supply and ground voltages with key ON and engine running as required by the vehicle.
  5. Measure termination resistance across CAN_H and CAN_L with battery disconnected; expect ~60 Ω. Inspect for unintended shorts to battery or ground.
  6. Using a digital multimeter and preferably an oscilloscope or CAN/LIN analyzer, observe bus voltages and waveform integrity while operating the vehicle or repeating the fault. Look for corrupted frames, bus-off events, or noise.
  7. If a specific message ID or node is identified as sending invalid data, isolate that module by disconnecting it (if safe and permitted) and observe if the code clears or changes.
  8. Check for and apply any manufacturer software updates or reflash procedures for the implicated module(s). Reprogram or reconfigure module coding if improper coding is suspected after replacement.
  9. If all wiring, power/ground and software are verified good and the module still sends invalid data, consider replacing the malfunctioning control module per manufacturer procedure.
  10. After repair, clear codes, retest under the original conditions, and confirm that the fault does not return. Document findings and repairs.

Likely causes

  • Defective module transmitting malformed frames or incorrect message contents
  • Damaged connector or chafed wiring on CAN/LIN high or low lines near the reported node
  • Missing or failed termination resistor(s) causing corrupted bus signals
  • Recent module replacement or software update with incorrect calibration or coding
  • Low or noisy supply/ground at the node causing data corruption

Fault status

⚠️ Status
Invalid data was received from a network node. The receiving module detected malformed or unexpected message content, timing, or checksum on the vehicle communication bus. This indicates a communication or data integrity problem that requires inspection of the node, wiring, bus integrity, and software.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours

Similar codes

U0100 U0073 U0121 U0199 U0155
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

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