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U0422 — Invalid Data Received From Body Control Module

Detailed page for trouble code U0422.

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Code

U0422

Generic U — Network/User

Invalid Data Received From Body Control Module

AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Corroded, loose or damaged connector at the BCM
  • Broken, shorted or chafed CAN/LIN bus wiring
  • Poor chassis or battery ground near BCM
  • BCM internal fault or intermittent failure
  • Module software mismatch, incomplete programming or corrupted calibration
  • Bus termination fault (missing or wrong resistor) or high bus noise

Symptoms

  • Body functions intermittent or non-functional (lights, locks, windows, alarm)
  • Incorrect instrument cluster messages or warnings related to body systems
  • Other network DTCs present (lost comms, bus off, invalid data from other modules)
  • Possible no communication with BCM using a scan tool or garbled data displayed
  • Vehicle may go into limp or reduced functionality modes for affected systems

What to check

  • Connect full-function scan tool and read all modules and DTCs; note any other U-codes or B/C/P codes
  • Verify BCM is present on the network and responds to the scan tool (module ID, software part number)
  • Check battery voltage and health; recharge if low and re-check codes
  • Visually inspect BCM connector and harness for corrosion, bent pins, water intrusion or physical damage
  • Inspect CAN/LIN wiring for chafe, breaks, or recent body repairs that could have disturbed harnesses
  • Measure and confirm ground connections and battery positive feed to BCM are clean, tight and corrosion-free

Signal parameters

  • CAN bus nominal recessive voltages: CAN_H ≈ 2.5 V and CAN_L ≈ 2.5 V
  • CAN bus dominant state typical: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (differential ≈ 2.0 V)
  • Typical CAN bitrates: common values 125 kbps, 250 kbps, 500 kbps or 1 Mbps — verify correct network speed for vehicle
  • Expected message intervals: BCM periodic messages often range 100–1000 ms; look for missing or malformed frames
  • Bus termination: two 120 ohm resistors in parallel (≈60 ohms) across CAN_H/CAN_L — measure for open or incorrect value

Diagnostic algorithm

  1. Record all DTCs and freeze frame data from all modules; note date/time and any recent service or module replacements.
  2. Verify vehicle battery is charged and terminals are clean; clear codes and attempt to reproduce. If code returns, continue.
  3. Confirm BCM appears on the network with scan tool and read BCM software/part numbers. Compare to other modules for version mismatches or recent updates.
  4. Inspect BCM connectors and harness for corrosion, water intrusion, damaged pins, or loose terminals. Repair as needed and retest.
  5. With ignition on, monitor CAN traffic with a capable scan tool or CAN bus analyzer. Look for invalid frames, repeated error frames, or bus-off conditions.
  6. Measure CAN_H and CAN_L voltages at BCM connector with respect to ground and measure differential during idle and activity. Verify termination resistance ≈60 ohms across CAN lines.
  7. If wiring and voltages are good but messages invalid, attempt to reprogram/update BCM software to correct calibration/incompatibility per manufacturer procedures.
  8. If reprogramming unavailable or unsuccessful, bench-test or swap with a known-good BCM (when possible and legal) to determine if module hardware is defective.
  9. After repairs or software updates, clear all codes, perform relearns/programming required for BCM, and road test while monitoring network for reoccurrence.
  10. If intermittent or complex, escalate to manufacturer-specific diagnostics or network specialists with scope traces and message logs.

Likely causes

  • Damaged CAN wiring or connector between BCM and main gateway
  • BCM lost power or has intermittent ground causing corrupted messages
  • BCM software/calibration incompatible with other modules after replacement or update
  • CAN bus noise or failed termination resistor causing message corruption

Fault status

⚠️ Status
Invalid data received from Body Control Module (BCM). Network messages from BCM are out-of-range, corrupted, or unexpected, indicating communication integrity or module issues.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-3.0 hours

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Code

U0422

HYUNDAI U — Network/User

Invalid Data Received From Body Control Module

AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Corroded, loose or damaged connector at the BCM
  • Broken, shorted or chafed CAN/LIN bus wiring
  • Poor chassis or battery ground near BCM
  • BCM internal fault or intermittent failure
  • Module software mismatch, incomplete programming or corrupted calibration
  • Bus termination fault (missing or wrong resistor) or high bus noise

Symptoms

  • Body functions intermittent or non-functional (lights, locks, windows, alarm)
  • Incorrect instrument cluster messages or warnings related to body systems
  • Other network DTCs present (lost comms, bus off, invalid data from other modules)
  • Possible no communication with BCM using a scan tool or garbled data displayed
  • Vehicle may go into limp or reduced functionality modes for affected systems

What to check

  • Connect full-function scan tool and read all modules and DTCs; note any other U-codes or B/C/P codes
  • Verify BCM is present on the network and responds to the scan tool (module ID, software part number)
  • Check battery voltage and health; recharge if low and re-check codes
  • Visually inspect BCM connector and harness for corrosion, bent pins, water intrusion or physical damage
  • Inspect CAN/LIN wiring for chafe, breaks, or recent body repairs that could have disturbed harnesses
  • Measure and confirm ground connections and battery positive feed to BCM are clean, tight and corrosion-free

Signal parameters

  • CAN bus nominal recessive voltages: CAN_H ≈ 2.5 V and CAN_L ≈ 2.5 V
  • CAN bus dominant state typical: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (differential ≈ 2.0 V)
  • Typical CAN bitrates: common values 125 kbps, 250 kbps, 500 kbps or 1 Mbps — verify correct network speed for vehicle
  • Expected message intervals: BCM periodic messages often range 100–1000 ms; look for missing or malformed frames
  • Bus termination: two 120 ohm resistors in parallel (≈60 ohms) across CAN_H/CAN_L — measure for open or incorrect value

Diagnostic algorithm

  1. Record all DTCs and freeze frame data from all modules; note date/time and any recent service or module replacements.
  2. Verify vehicle battery is charged and terminals are clean; clear codes and attempt to reproduce. If code returns, continue.
  3. Confirm BCM appears on the network with scan tool and read BCM software/part numbers. Compare to other modules for version mismatches or recent updates.
  4. Inspect BCM connectors and harness for corrosion, water intrusion, damaged pins, or loose terminals. Repair as needed and retest.
  5. With ignition on, monitor CAN traffic with a capable scan tool or CAN bus analyzer. Look for invalid frames, repeated error frames, or bus-off conditions.
  6. Measure CAN_H and CAN_L voltages at BCM connector with respect to ground and measure differential during idle and activity. Verify termination resistance ≈60 ohms across CAN lines.
  7. If wiring and voltages are good but messages invalid, attempt to reprogram/update BCM software to correct calibration/incompatibility per manufacturer procedures.
  8. If reprogramming unavailable or unsuccessful, bench-test or swap with a known-good BCM (when possible and legal) to determine if module hardware is defective.
  9. After repairs or software updates, clear all codes, perform relearns/programming required for BCM, and road test while monitoring network for reoccurrence.
  10. If intermittent or complex, escalate to manufacturer-specific diagnostics or network specialists with scope traces and message logs.

Likely causes

  • Damaged CAN wiring or connector between BCM and main gateway
  • BCM lost power or has intermittent ground causing corrupted messages
  • BCM software/calibration incompatible with other modules after replacement or update
  • CAN bus noise or failed termination resistor causing message corruption

Fault status

⚠️ Status
Invalid data received from Body Control Module (BCM). Network messages from BCM are out-of-range, corrupted, or unexpected, indicating communication integrity or module issues.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-3.0 hours

Similar codes

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Code

U0422

LAND ROVER U — Network/User

Invalid data received from the body control module

AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Corroded, loose or damaged connector at the BCM
  • Broken, shorted or chafed CAN/LIN bus wiring
  • Poor chassis or battery ground near BCM
  • BCM internal fault or intermittent failure
  • Module software mismatch, incomplete programming or corrupted calibration
  • Bus termination fault (missing or wrong resistor) or high bus noise

Symptoms

  • Body functions intermittent or non-functional (lights, locks, windows, alarm)
  • Incorrect instrument cluster messages or warnings related to body systems
  • Other network DTCs present (lost comms, bus off, invalid data from other modules)
  • Possible no communication with BCM using a scan tool or garbled data displayed
  • Vehicle may go into limp or reduced functionality modes for affected systems

What to check

  • Connect full-function scan tool and read all modules and DTCs; note any other U-codes or B/C/P codes
  • Verify BCM is present on the network and responds to the scan tool (module ID, software part number)
  • Check battery voltage and health; recharge if low and re-check codes
  • Visually inspect BCM connector and harness for corrosion, bent pins, water intrusion or physical damage
  • Inspect CAN/LIN wiring for chafe, breaks, or recent body repairs that could have disturbed harnesses
  • Measure and confirm ground connections and battery positive feed to BCM are clean, tight and corrosion-free

Signal parameters

  • CAN bus nominal recessive voltages: CAN_H ≈ 2.5 V and CAN_L ≈ 2.5 V
  • CAN bus dominant state typical: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V (differential ≈ 2.0 V)
  • Typical CAN bitrates: common values 125 kbps, 250 kbps, 500 kbps or 1 Mbps — verify correct network speed for vehicle
  • Expected message intervals: BCM periodic messages often range 100–1000 ms; look for missing or malformed frames
  • Bus termination: two 120 ohm resistors in parallel (≈60 ohms) across CAN_H/CAN_L — measure for open or incorrect value

Diagnostic algorithm

  1. Record all DTCs and freeze frame data from all modules; note date/time and any recent service or module replacements.
  2. Verify vehicle battery is charged and terminals are clean; clear codes and attempt to reproduce. If code returns, continue.
  3. Confirm BCM appears on the network with scan tool and read BCM software/part numbers. Compare to other modules for version mismatches or recent updates.
  4. Inspect BCM connectors and harness for corrosion, water intrusion, damaged pins, or loose terminals. Repair as needed and retest.
  5. With ignition on, monitor CAN traffic with a capable scan tool or CAN bus analyzer. Look for invalid frames, repeated error frames, or bus-off conditions.
  6. Measure CAN_H and CAN_L voltages at BCM connector with respect to ground and measure differential during idle and activity. Verify termination resistance ≈60 ohms across CAN lines.
  7. If wiring and voltages are good but messages invalid, attempt to reprogram/update BCM software to correct calibration/incompatibility per manufacturer procedures.
  8. If reprogramming unavailable or unsuccessful, bench-test or swap with a known-good BCM (when possible and legal) to determine if module hardware is defective.
  9. After repairs or software updates, clear all codes, perform relearns/programming required for BCM, and road test while monitoring network for reoccurrence.
  10. If intermittent or complex, escalate to manufacturer-specific diagnostics or network specialists with scope traces and message logs.

Likely causes

  • Damaged CAN wiring or connector between BCM and main gateway
  • BCM lost power or has intermittent ground causing corrupted messages
  • BCM software/calibration incompatible with other modules after replacement or update
  • CAN bus noise or failed termination resistor causing message corruption

Fault status

⚠️ Status
Invalid data received from Body Control Module (BCM). Network messages from BCM are out-of-range, corrupted, or unexpected, indicating communication integrity or module issues.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-3.0 hours

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