Code
U0235
Generic
U — Network/User
Lost Communication With Front Distance Range Sensor - Single Sensor or Center
Views:
UK: 19
EN: 23
RU: 37
AI status
Completed
Completed
100%
Causes
- Faulty front distance/range sensor
- Open, short or intermittent wiring between sensor and network/controller
- Poor connector pins, corrosion, or physical damage at sensor connector
- Sensor power (fuse, ignition feed) or ground missing
- CAN/LIN bus wiring fault, missing termination, or high bus load
- Control module (ECU) fault or software/firmware mismatch
Symptoms
- Warning lamp/message indicating front distance sensor unavailable
- Loss or degradation of adaptive cruise control, forward collision alert/mitigation, or parking assist
- No sensor data displayed in diagnostic tool for that sensor
- Intermittent operation of distance-based features or default/fallback behavior
- Other modules reporting network errors or related U-codes
What to check
- Record all stored U-codes and freeze frame data with a capable scan tool
- Confirm whether code is permanent, pending, or current; attempt to clear and re-check
- Visually inspect sensor and harness for damage, corrosion, moisture, or water intrusion
- Check fuses and power feeds related to sensor supply and instrument/control module
- Verify good ground(s) at sensor and control module
- Check for other network errors on CAN/LIN bus and whether other modules are communicating
Signal parameters
- CAN bus idle (recessive): CANH ≈ 2.5 V, CANL ≈ 2.5 V (vehicle dependent)
- CAN bus dominant voltages during transmission: CANH ≈ 3.5–4.0 V, CANL ≈ 1.0–1.5 V (differential ≈ 2 V)
- Typical sensor supply voltage: approx. battery voltage (~11–14 V with engine running); check vehicle spec
- Sensor message frequency: often in the single-digit to tens of Hz (consult OEM data for exact rate)
- Expected: valid sensor ID and periodic distance messages present on bus; message counters/checksums valid
Diagnostic algorithm
- Connect a full-function scan tool. Record U0235 and any related codes; note freeze frame and module IDs.
- Clear DTCs, cycle ignition, and see if U0235 returns to determine intermittent vs permanent fault.
- Verify the sensor model/part number and software level vs vehicle requirements if sensor was recently replaced.
- Inspect sensor connector and harness for corrosion, bent pins, damage, or water intrusion. Repair as needed.
- Check fuses and measure supply voltage and ground at the sensor connector (key ON). Confirm proper battery voltage and ground continuity.
- Measure CANH/CANL at the sensor connector with key ON. Compare to expected idle and dominant values. If voltages are missing or abnormal, trace wiring back toward the module or junction point.
- Perform a wiggle/strain test on harness and connector while monitoring live data/messages to locate intermittent opens/shorts.
- If CAN voltages present but no messages from sensor, connect an oscilloscope or CAN bus analyzer to capture and verify message frames and IDs. Check for message repetition rate and checksum/counter validity.
- Isolate sensor from the bus (disconnect) and check whether bus integrity changes (other modules continue to communicate). Check termination resistors and bus load if multiple nodes affected.
- If wiring, power, and bus are good and the sensor does not transmit, replace the sensor. If replacement fails, suspect controlling module or network fault and follow manufacturer module-level diagnostics and reprogramming steps.
- After repair or replacement, clear codes and perform a functional test/road test. Verify ADAS functions and confirm no return of U0235.
Likely causes
- Damaged sensor connector (corrosion, bent pins) causing intermittent contact
- Broken or shorted CAN high/low or sensor power/ground conductor in harness
- Blown fuse or open power feed to the sensor
- Faulty sensor internal electronics
- Defective control module or missing/incorrect software configuration
Fault status
Status
Lost Communication With Front Distance Range Sensor — No valid data frames received from the front distance/range sensor on the vehicle data bus.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Workshop ManualYour experience will help others
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Code
U0235
HYUNDAI
U — Network/User
Lost Communication With Cruise Control Front Distance Range Sensor
Views:
UK: 11
EN: 17
RU: 25
AI status
Completed
Completed
100%
Causes
- Faulty front distance/range sensor
- Open, short or intermittent wiring between sensor and network/controller
- Poor connector pins, corrosion, or physical damage at sensor connector
- Sensor power (fuse, ignition feed) or ground missing
- CAN/LIN bus wiring fault, missing termination, or high bus load
- Control module (ECU) fault or software/firmware mismatch
Symptoms
- Warning lamp/message indicating front distance sensor unavailable
- Loss or degradation of adaptive cruise control, forward collision alert/mitigation, or parking assist
- No sensor data displayed in diagnostic tool for that sensor
- Intermittent operation of distance-based features or default/fallback behavior
- Other modules reporting network errors or related U-codes
What to check
- Record all stored U-codes and freeze frame data with a capable scan tool
- Confirm whether code is permanent, pending, or current; attempt to clear and re-check
- Visually inspect sensor and harness for damage, corrosion, moisture, or water intrusion
- Check fuses and power feeds related to sensor supply and instrument/control module
- Verify good ground(s) at sensor and control module
- Check for other network errors on CAN/LIN bus and whether other modules are communicating
Signal parameters
- CAN bus idle (recessive): CANH ≈ 2.5 V, CANL ≈ 2.5 V (vehicle dependent)
- CAN bus dominant voltages during transmission: CANH ≈ 3.5–4.0 V, CANL ≈ 1.0–1.5 V (differential ≈ 2 V)
- Typical sensor supply voltage: approx. battery voltage (~11–14 V with engine running); check vehicle spec
- Sensor message frequency: often in the single-digit to tens of Hz (consult OEM data for exact rate)
- Expected: valid sensor ID and periodic distance messages present on bus; message counters/checksums valid
Diagnostic algorithm
- Connect a full-function scan tool. Record U0235 and any related codes; note freeze frame and module IDs.
- Clear DTCs, cycle ignition, and see if U0235 returns to determine intermittent vs permanent fault.
- Verify the sensor model/part number and software level vs vehicle requirements if sensor was recently replaced.
- Inspect sensor connector and harness for corrosion, bent pins, damage, or water intrusion. Repair as needed.
- Check fuses and measure supply voltage and ground at the sensor connector (key ON). Confirm proper battery voltage and ground continuity.
- Measure CANH/CANL at the sensor connector with key ON. Compare to expected idle and dominant values. If voltages are missing or abnormal, trace wiring back toward the module or junction point.
- Perform a wiggle/strain test on harness and connector while monitoring live data/messages to locate intermittent opens/shorts.
- If CAN voltages present but no messages from sensor, connect an oscilloscope or CAN bus analyzer to capture and verify message frames and IDs. Check for message repetition rate and checksum/counter validity.
- Isolate sensor from the bus (disconnect) and check whether bus integrity changes (other modules continue to communicate). Check termination resistors and bus load if multiple nodes affected.
- If wiring, power, and bus are good and the sensor does not transmit, replace the sensor. If replacement fails, suspect controlling module or network fault and follow manufacturer module-level diagnostics and reprogramming steps.
- After repair or replacement, clear codes and perform a functional test/road test. Verify ADAS functions and confirm no return of U0235.
Likely causes
- Damaged sensor connector (corrosion, bent pins) causing intermittent contact
- Broken or shorted CAN high/low or sensor power/ground conductor in harness
- Blown fuse or open power feed to the sensor
- Faulty sensor internal electronics
- Defective control module or missing/incorrect software configuration
Fault status
Status
Lost Communication With Front Distance Range Sensor — No valid data frames received from the front distance/range sensor on the vehicle data bus.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
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Code
U0235
LAND ROVER
U — Network/User
Lost communication with the speed control of the distance sensor frontal
Views:
UK: 4
EN: 9
RU: 17
AI status
Completed
Completed
100%
Causes
- Faulty front distance/range sensor
- Open, short or intermittent wiring between sensor and network/controller
- Poor connector pins, corrosion, or physical damage at sensor connector
- Sensor power (fuse, ignition feed) or ground missing
- CAN/LIN bus wiring fault, missing termination, or high bus load
- Control module (ECU) fault or software/firmware mismatch
Symptoms
- Warning lamp/message indicating front distance sensor unavailable
- Loss or degradation of adaptive cruise control, forward collision alert/mitigation, or parking assist
- No sensor data displayed in diagnostic tool for that sensor
- Intermittent operation of distance-based features or default/fallback behavior
- Other modules reporting network errors or related U-codes
What to check
- Record all stored U-codes and freeze frame data with a capable scan tool
- Confirm whether code is permanent, pending, or current; attempt to clear and re-check
- Visually inspect sensor and harness for damage, corrosion, moisture, or water intrusion
- Check fuses and power feeds related to sensor supply and instrument/control module
- Verify good ground(s) at sensor and control module
- Check for other network errors on CAN/LIN bus and whether other modules are communicating
Signal parameters
- CAN bus idle (recessive): CANH ≈ 2.5 V, CANL ≈ 2.5 V (vehicle dependent)
- CAN bus dominant voltages during transmission: CANH ≈ 3.5–4.0 V, CANL ≈ 1.0–1.5 V (differential ≈ 2 V)
- Typical sensor supply voltage: approx. battery voltage (~11–14 V with engine running); check vehicle spec
- Sensor message frequency: often in the single-digit to tens of Hz (consult OEM data for exact rate)
- Expected: valid sensor ID and periodic distance messages present on bus; message counters/checksums valid
Diagnostic algorithm
- Connect a full-function scan tool. Record U0235 and any related codes; note freeze frame and module IDs.
- Clear DTCs, cycle ignition, and see if U0235 returns to determine intermittent vs permanent fault.
- Verify the sensor model/part number and software level vs vehicle requirements if sensor was recently replaced.
- Inspect sensor connector and harness for corrosion, bent pins, damage, or water intrusion. Repair as needed.
- Check fuses and measure supply voltage and ground at the sensor connector (key ON). Confirm proper battery voltage and ground continuity.
- Measure CANH/CANL at the sensor connector with key ON. Compare to expected idle and dominant values. If voltages are missing or abnormal, trace wiring back toward the module or junction point.
- Perform a wiggle/strain test on harness and connector while monitoring live data/messages to locate intermittent opens/shorts.
- If CAN voltages present but no messages from sensor, connect an oscilloscope or CAN bus analyzer to capture and verify message frames and IDs. Check for message repetition rate and checksum/counter validity.
- Isolate sensor from the bus (disconnect) and check whether bus integrity changes (other modules continue to communicate). Check termination resistors and bus load if multiple nodes affected.
- If wiring, power, and bus are good and the sensor does not transmit, replace the sensor. If replacement fails, suspect controlling module or network fault and follow manufacturer module-level diagnostics and reprogramming steps.
- After repair or replacement, clear codes and perform a functional test/road test. Verify ADAS functions and confirm no return of U0235.
Likely causes
- Damaged sensor connector (corrosion, bent pins) causing intermittent contact
- Broken or shorted CAN high/low or sensor power/ground conductor in harness
- Blown fuse or open power feed to the sensor
- Faulty sensor internal electronics
- Defective control module or missing/incorrect software configuration
Fault status
Status
Lost Communication With Front Distance Range Sensor — No valid data frames received from the front distance/range sensor on the vehicle data bus.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualYour experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
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Send to email
Code
U0235
MERCEDES-BENZ
U — Network/User
Lost Communications with Cruise Control Front Distance Range Sensor
Views:
UK: 13
EN: 19
RU: 29
AI status
Completed
Completed
100%
Causes
- Faulty front distance/range sensor
- Open, short or intermittent wiring between sensor and network/controller
- Poor connector pins, corrosion, or physical damage at sensor connector
- Sensor power (fuse, ignition feed) or ground missing
- CAN/LIN bus wiring fault, missing termination, or high bus load
- Control module (ECU) fault or software/firmware mismatch
Symptoms
- Warning lamp/message indicating front distance sensor unavailable
- Loss or degradation of adaptive cruise control, forward collision alert/mitigation, or parking assist
- No sensor data displayed in diagnostic tool for that sensor
- Intermittent operation of distance-based features or default/fallback behavior
- Other modules reporting network errors or related U-codes
What to check
- Record all stored U-codes and freeze frame data with a capable scan tool
- Confirm whether code is permanent, pending, or current; attempt to clear and re-check
- Visually inspect sensor and harness for damage, corrosion, moisture, or water intrusion
- Check fuses and power feeds related to sensor supply and instrument/control module
- Verify good ground(s) at sensor and control module
- Check for other network errors on CAN/LIN bus and whether other modules are communicating
Signal parameters
- CAN bus idle (recessive): CANH ≈ 2.5 V, CANL ≈ 2.5 V (vehicle dependent)
- CAN bus dominant voltages during transmission: CANH ≈ 3.5–4.0 V, CANL ≈ 1.0–1.5 V (differential ≈ 2 V)
- Typical sensor supply voltage: approx. battery voltage (~11–14 V with engine running); check vehicle spec
- Sensor message frequency: often in the single-digit to tens of Hz (consult OEM data for exact rate)
- Expected: valid sensor ID and periodic distance messages present on bus; message counters/checksums valid
Diagnostic algorithm
- Connect a full-function scan tool. Record U0235 and any related codes; note freeze frame and module IDs.
- Clear DTCs, cycle ignition, and see if U0235 returns to determine intermittent vs permanent fault.
- Verify the sensor model/part number and software level vs vehicle requirements if sensor was recently replaced.
- Inspect sensor connector and harness for corrosion, bent pins, damage, or water intrusion. Repair as needed.
- Check fuses and measure supply voltage and ground at the sensor connector (key ON). Confirm proper battery voltage and ground continuity.
- Measure CANH/CANL at the sensor connector with key ON. Compare to expected idle and dominant values. If voltages are missing or abnormal, trace wiring back toward the module or junction point.
- Perform a wiggle/strain test on harness and connector while monitoring live data/messages to locate intermittent opens/shorts.
- If CAN voltages present but no messages from sensor, connect an oscilloscope or CAN bus analyzer to capture and verify message frames and IDs. Check for message repetition rate and checksum/counter validity.
- Isolate sensor from the bus (disconnect) and check whether bus integrity changes (other modules continue to communicate). Check termination resistors and bus load if multiple nodes affected.
- If wiring, power, and bus are good and the sensor does not transmit, replace the sensor. If replacement fails, suspect controlling module or network fault and follow manufacturer module-level diagnostics and reprogramming steps.
- After repair or replacement, clear codes and perform a functional test/road test. Verify ADAS functions and confirm no return of U0235.
Likely causes
- Damaged sensor connector (corrosion, bent pins) causing intermittent contact
- Broken or shorted CAN high/low or sensor power/ground conductor in harness
- Blown fuse or open power feed to the sensor
- Faulty sensor internal electronics
- Defective control module or missing/incorrect software configuration
Fault status
Status
Lost Communication With Front Distance Range Sensor — No valid data frames received from the front distance/range sensor on the vehicle data bus.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Your experience will help others
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Was this AI description helpful?
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