Code
U0208
Generic
U — Network/User
Lost Communication With Seat Control Module A
Views:
UK: 27
EN: 42
RU: 45
AI status
Completed
Completed
100%
Causes
- Faulty seat control module (internal failure)
- Power or ground supply problem to seat control module
- Damaged, corroded, or disconnected connector at the seat control module
- Open, shorted, or high-resistance wiring on the vehicle data bus (CAN or LIN) to the module
- Missing or failed bus termination resistor(s)
- Module not configured/programmed or incompatible software
Symptoms
- Seat functions (position, memory, heating, ventilation) may be inoperative or intermittent
- Seat position memory recall may not work
- Relevant dash or seat-related warning lamps or messages
- Other modules show related communication errors or reduced functionality
- DTC remains stored and may return after clearing
What to check
- Connect a professional scan tool and confirm U0208 and any additional U-codes; note freeze frame and occurrence frequency
- Verify whether the seat control module is present/listed on the vehicle network using the scan tool
- Inspect connectors and wiring at the seat control module for corrosion, bent pins, water, or damage
- Check fuses and relays supplying the seat module power and ignition circuits
- Measure module supply and ground voltages with a DVM (expected nominal 11–14 V with ignition on)
- Verify data-bus physical layer: measure bus idle voltages and check termination resistance (approximately 60 ohms across CAN high/low) or LIN single-wire idle level per manufacturer
Signal parameters
- Network: CAN or LIN depending on vehicle; verify correct bus for seat module in wiring diagram
- Expected supply voltage to module: approx. 11–14 V with ignition on
- CAN bus idle (recessive) nominal around mid-supply; differential waveform present when transmitting (use scope/ANalyzer)
- Typical message cadence: periodic diagnostic/telemetry messages (often 100–1000 ms intervals) — check OEM data for exact intervals/IDs
- Termination: correct bus termination (≈60 ohms across CAN high/low) or single-wire LIN pull-up/pull-down per OEM spec
Diagnostic algorithm
- Read and record all DTCs and freeze-frame data with a capable scan tool. Note if U0208 is current or history and any related U- or B- codes.
- Verify module presence on the network. Use the scan tool to try to communicate with the seat control module and list its network address or response.
- Visually inspect connectors, pins, and harness routing to the seat module (under seat, through trim). Repair obvious damage or corrosion.
- Check fuses and measure module battery/ignition supply and ground integrity at the module connector. Repair poor power/ground before further testing.
- Measure bus physical layer: check idle voltages and termination resistance. If values are out of range, trace and repair wiring/terminators.
- Use an oscilloscope or CAN/LIN bus analyzer to observe traffic. Confirm whether the seat module transmits periodic frames. If no traffic, focus on power/communications wiring.
- Perform wiggle and load tests on harnesses while monitoring for changes in communication to find intermittent faults.
- If wiring and network are verified good and module still non-responsive, check for module-specific software or configuration faults — verify software/calibration level and reprogram if required by OEM.
- Replace the seat control module only after verifying wiring, power, grounds, and bus integrity. Follow OEM programming and initialization procedures after replacement.
- Clear codes and perform functional tests to confirm repair; re-scan to ensure U0208 does not return.
Likely causes
- Blown/loose fuse or poor battery/ignition supply to the seat control module
- Corroded pin or connector at the seat module or body harness under the seat
- Broken CAN/LIN shield or short to body/chassis ground
- Failed seat module after water exposure or crash-related damage
- Incorrect or missing module programming after replacement
Fault status
Status
Lost Communication With Seat Control Module A — No response or missing messages on vehicle network
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Repair manuals
Brands with available manuals
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The library contains 3,330 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.
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Code
U0208
HYUNDAI
U — Network/User
Lost Communication With “Seat Control Module A”
Views:
UK: 15
EN: 34
RU: 32
AI status
Completed
Completed
100%
Causes
- Faulty seat control module (internal failure)
- Power or ground supply problem to seat control module
- Damaged, corroded, or disconnected connector at the seat control module
- Open, shorted, or high-resistance wiring on the vehicle data bus (CAN or LIN) to the module
- Missing or failed bus termination resistor(s)
- Module not configured/programmed or incompatible software
Symptoms
- Seat functions (position, memory, heating, ventilation) may be inoperative or intermittent
- Seat position memory recall may not work
- Relevant dash or seat-related warning lamps or messages
- Other modules show related communication errors or reduced functionality
- DTC remains stored and may return after clearing
What to check
- Connect a professional scan tool and confirm U0208 and any additional U-codes; note freeze frame and occurrence frequency
- Verify whether the seat control module is present/listed on the vehicle network using the scan tool
- Inspect connectors and wiring at the seat control module for corrosion, bent pins, water, or damage
- Check fuses and relays supplying the seat module power and ignition circuits
- Measure module supply and ground voltages with a DVM (expected nominal 11–14 V with ignition on)
- Verify data-bus physical layer: measure bus idle voltages and check termination resistance (approximately 60 ohms across CAN high/low) or LIN single-wire idle level per manufacturer
Signal parameters
- Network: CAN or LIN depending on vehicle; verify correct bus for seat module in wiring diagram
- Expected supply voltage to module: approx. 11–14 V with ignition on
- CAN bus idle (recessive) nominal around mid-supply; differential waveform present when transmitting (use scope/ANalyzer)
- Typical message cadence: periodic diagnostic/telemetry messages (often 100–1000 ms intervals) — check OEM data for exact intervals/IDs
- Termination: correct bus termination (≈60 ohms across CAN high/low) or single-wire LIN pull-up/pull-down per OEM spec
Diagnostic algorithm
- Read and record all DTCs and freeze-frame data with a capable scan tool. Note if U0208 is current or history and any related U- or B- codes.
- Verify module presence on the network. Use the scan tool to try to communicate with the seat control module and list its network address or response.
- Visually inspect connectors, pins, and harness routing to the seat module (under seat, through trim). Repair obvious damage or corrosion.
- Check fuses and measure module battery/ignition supply and ground integrity at the module connector. Repair poor power/ground before further testing.
- Measure bus physical layer: check idle voltages and termination resistance. If values are out of range, trace and repair wiring/terminators.
- Use an oscilloscope or CAN/LIN bus analyzer to observe traffic. Confirm whether the seat module transmits periodic frames. If no traffic, focus on power/communications wiring.
- Perform wiggle and load tests on harnesses while monitoring for changes in communication to find intermittent faults.
- If wiring and network are verified good and module still non-responsive, check for module-specific software or configuration faults — verify software/calibration level and reprogram if required by OEM.
- Replace the seat control module only after verifying wiring, power, grounds, and bus integrity. Follow OEM programming and initialization procedures after replacement.
- Clear codes and perform functional tests to confirm repair; re-scan to ensure U0208 does not return.
Likely causes
- Blown/loose fuse or poor battery/ignition supply to the seat control module
- Corroded pin or connector at the seat module or body harness under the seat
- Broken CAN/LIN shield or short to body/chassis ground
- Failed seat module after water exposure or crash-related damage
- Incorrect or missing module programming after replacement
Fault status
Status
Lost Communication With Seat Control Module A — No response or missing messages on vehicle network
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Repair manuals
Manual library for HYUNDAI
370
Browse 370 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
HYUNDAI
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HYUNDAI: 2023
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Tucson
- Hybrid Blue
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HYUNDAI: 2022
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Kona N
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Veloster N
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Veloster N
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Palisade
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Veloster N
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Code
U0208
LAND ROVER
U — Network/User
Lost communication with seat control module A
Views:
UK: 13
EN: 37
RU: 25
AI status
Completed
Completed
100%
Causes
- Faulty seat control module (internal failure)
- Power or ground supply problem to seat control module
- Damaged, corroded, or disconnected connector at the seat control module
- Open, shorted, or high-resistance wiring on the vehicle data bus (CAN or LIN) to the module
- Missing or failed bus termination resistor(s)
- Module not configured/programmed or incompatible software
Symptoms
- Seat functions (position, memory, heating, ventilation) may be inoperative or intermittent
- Seat position memory recall may not work
- Relevant dash or seat-related warning lamps or messages
- Other modules show related communication errors or reduced functionality
- DTC remains stored and may return after clearing
What to check
- Connect a professional scan tool and confirm U0208 and any additional U-codes; note freeze frame and occurrence frequency
- Verify whether the seat control module is present/listed on the vehicle network using the scan tool
- Inspect connectors and wiring at the seat control module for corrosion, bent pins, water, or damage
- Check fuses and relays supplying the seat module power and ignition circuits
- Measure module supply and ground voltages with a DVM (expected nominal 11–14 V with ignition on)
- Verify data-bus physical layer: measure bus idle voltages and check termination resistance (approximately 60 ohms across CAN high/low) or LIN single-wire idle level per manufacturer
Signal parameters
- Network: CAN or LIN depending on vehicle; verify correct bus for seat module in wiring diagram
- Expected supply voltage to module: approx. 11–14 V with ignition on
- CAN bus idle (recessive) nominal around mid-supply; differential waveform present when transmitting (use scope/ANalyzer)
- Typical message cadence: periodic diagnostic/telemetry messages (often 100–1000 ms intervals) — check OEM data for exact intervals/IDs
- Termination: correct bus termination (≈60 ohms across CAN high/low) or single-wire LIN pull-up/pull-down per OEM spec
Diagnostic algorithm
- Read and record all DTCs and freeze-frame data with a capable scan tool. Note if U0208 is current or history and any related U- or B- codes.
- Verify module presence on the network. Use the scan tool to try to communicate with the seat control module and list its network address or response.
- Visually inspect connectors, pins, and harness routing to the seat module (under seat, through trim). Repair obvious damage or corrosion.
- Check fuses and measure module battery/ignition supply and ground integrity at the module connector. Repair poor power/ground before further testing.
- Measure bus physical layer: check idle voltages and termination resistance. If values are out of range, trace and repair wiring/terminators.
- Use an oscilloscope or CAN/LIN bus analyzer to observe traffic. Confirm whether the seat module transmits periodic frames. If no traffic, focus on power/communications wiring.
- Perform wiggle and load tests on harnesses while monitoring for changes in communication to find intermittent faults.
- If wiring and network are verified good and module still non-responsive, check for module-specific software or configuration faults — verify software/calibration level and reprogram if required by OEM.
- Replace the seat control module only after verifying wiring, power, grounds, and bus integrity. Follow OEM programming and initialization procedures after replacement.
- Clear codes and perform functional tests to confirm repair; re-scan to ensure U0208 does not return.
Likely causes
- Blown/loose fuse or poor battery/ignition supply to the seat control module
- Corroded pin or connector at the seat module or body harness under the seat
- Broken CAN/LIN shield or short to body/chassis ground
- Failed seat module after water exposure or crash-related damage
- Incorrect or missing module programming after replacement
Fault status
Status
Lost Communication With Seat Control Module A — No response or missing messages on vehicle network
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Repair manuals
Manual library for LAND ROVER
160
Browse 160 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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LAND ROVER: 2023
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Range Rover Velar
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Discovery Sport
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Range Rover
- Autobiography, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover Autobiography
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- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
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Range Rover Evoque
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Range Rover Sport
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Range Rover Velar
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LAND ROVER: 2021
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Discovery Sport
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Range Rover
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography Fifty Edition
- 2021 Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
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Range Rover Sport
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
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- SVR Carbon Edition
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Range Rover Velar
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LAND ROVER: 2020
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Discovery
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- Landmark
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
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Discovery Sport
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Range Rover
- Autobiography
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
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- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- SVAutobiography
- SVAutobiography Dynamic
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
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- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE Dynamic
- HSE PHEV
- HST
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SVR
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Range Rover Velar
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
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- SVAutobiography Dyn.
-
LAND ROVER: 2019
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