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Home / DTC / U0133 — Lost Communication With Active Roll Control Module

U0133 — Lost Communication With Active Roll Control Module

Detailed page for trouble code U0133.

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U0133

Generic U — Network/User

Lost Communication With Active Roll Control Module

Brand: Generic
Type: U — Network/User
Views: UK: 15 EN: 29 RU: 19
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open, shorted or corroded wiring or connectors to the ARC module
  • Power or ground supply failure to the ARC module
  • Faulty ARC module (internal failure)
  • Vehicle network (CAN/LIN) fault or bus-off condition
  • Missing or incorrect module programming/coding after replacement
  • Intermittent connections (water intrusion, broken wire strands)

Symptoms

  • ABS/ESC/traction control warning lamp or stability message illuminated
  • Roll-control or suspension-related warning message on instrument cluster
  • Loss or reduction of active roll control function; vehicle may feel less stable in quick lane changes
  • Related adaptive suspension features disabled
  • Stored network communication codes in scan tool

What to check

  • Connect a capable scan tool. Verify U0133 and any related U-codes; note freeze frame and occurrence count
  • Check for presence of the ARC module on the network via the scan tool (module ID, addressable)
  • Inspect ARC module connector for corrosion, bent pins, water ingress and secure locking
  • Verify module supply voltage at connector (battery voltage with ignition on) and ground integrity
  • Measure CAN bus voltages at module connector: CAN_H, CAN_L and differential
  • Measure resistance across CAN_H to CAN_L with ignition off (check termination ~60 ohms total)

Signal parameters

  • Module supply voltage: battery voltage (approx. 11–14.5 V with ignition on)
  • Ground: low resistance to battery negative (
  • CAN bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (each to chassis); differential near 0 V at idle, ±1 V during activity
  • CAN bus termination resistance: ~60 ohms measured between CAN_H and CAN_L at two-wire terminated network (two 120 Ω in parallel)
  • Short checks: no direct short to battery or ground on CAN_H or CAN_L

Diagnostic algorithm

  1. Retrieve all stored codes and freeze frame with a scan tool. Note any other network or module-specific codes.
  2. Attempt to communicate with the ARC module. If communication is intermittent, do a continuous monitor while performing wiggle tests on the harness and connectors.
  3. Visually inspect ARC module connector and harness for damage, corrosion, or moisture. Repair or replace damaged connectors as needed.
  4. Verify power and ground at the ARC module connector. Repair any open/poor circuits (check fuses, relays, and ground points).
  5. Backprobe CAN_H and CAN_L at the ARC connector. With ignition on, record voltages and verify termination resistance with ignition off.
  6. If bus voltages or termination are out of range, isolate and repair short/open. Disconnect other modules one at a time (if safe) to identify a faulty node causing bus issues.
  7. Check for a module in bus-off state via scan tool; clear codes and attempt to reinitialize the bus. If a module goes bus-off immediately, track wiring or node causing the condition.
  8. If wiring and network checks are good and the module receives proper power/ground but still won’t communicate, consider reprogramming/coding per manufacturer procedure. Replacing the ARC module should be a last step after verifying wiring and bus integrity.
  9. After repair or module replacement, clear codes and perform a road test or function test to confirm communication and functionality. Re-scan for recurrent codes.

Likely causes

  • Damaged connector pins or corrosion at ARC module connector
  • High resistance/poor ground at ARC module or common ground point
  • CAN high/low shorted to each other, to battery, or to ground near ARC module
  • Module powered but held in bus-off due to another node fault
  • ARC module internal hardware/software failure

Fault status

⚠️ Status
Lost Communication With Active Roll Control Module — ARC module not responding on vehicle network. Stability/roll-control systems may be disabled or operating in fallback mode.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0100 U0121 U0140 U0155 U0201
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Code

U0133

HYUNDAI U — Network/User

Lost Communication With Active Roll Control Module

Brand: HYUNDAI
Type: U — Network/User
Views: UK: 8 EN: 21 RU: 15
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open, shorted or corroded wiring or connectors to the ARC module
  • Power or ground supply failure to the ARC module
  • Faulty ARC module (internal failure)
  • Vehicle network (CAN/LIN) fault or bus-off condition
  • Missing or incorrect module programming/coding after replacement
  • Intermittent connections (water intrusion, broken wire strands)

Symptoms

  • ABS/ESC/traction control warning lamp or stability message illuminated
  • Roll-control or suspension-related warning message on instrument cluster
  • Loss or reduction of active roll control function; vehicle may feel less stable in quick lane changes
  • Related adaptive suspension features disabled
  • Stored network communication codes in scan tool

What to check

  • Connect a capable scan tool. Verify U0133 and any related U-codes; note freeze frame and occurrence count
  • Check for presence of the ARC module on the network via the scan tool (module ID, addressable)
  • Inspect ARC module connector for corrosion, bent pins, water ingress and secure locking
  • Verify module supply voltage at connector (battery voltage with ignition on) and ground integrity
  • Measure CAN bus voltages at module connector: CAN_H, CAN_L and differential
  • Measure resistance across CAN_H to CAN_L with ignition off (check termination ~60 ohms total)

Signal parameters

  • Module supply voltage: battery voltage (approx. 11–14.5 V with ignition on)
  • Ground: low resistance to battery negative (
  • CAN bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (each to chassis); differential near 0 V at idle, ±1 V during activity
  • CAN bus termination resistance: ~60 ohms measured between CAN_H and CAN_L at two-wire terminated network (two 120 Ω in parallel)
  • Short checks: no direct short to battery or ground on CAN_H or CAN_L

Diagnostic algorithm

  1. Retrieve all stored codes and freeze frame with a scan tool. Note any other network or module-specific codes.
  2. Attempt to communicate with the ARC module. If communication is intermittent, do a continuous monitor while performing wiggle tests on the harness and connectors.
  3. Visually inspect ARC module connector and harness for damage, corrosion, or moisture. Repair or replace damaged connectors as needed.
  4. Verify power and ground at the ARC module connector. Repair any open/poor circuits (check fuses, relays, and ground points).
  5. Backprobe CAN_H and CAN_L at the ARC connector. With ignition on, record voltages and verify termination resistance with ignition off.
  6. If bus voltages or termination are out of range, isolate and repair short/open. Disconnect other modules one at a time (if safe) to identify a faulty node causing bus issues.
  7. Check for a module in bus-off state via scan tool; clear codes and attempt to reinitialize the bus. If a module goes bus-off immediately, track wiring or node causing the condition.
  8. If wiring and network checks are good and the module receives proper power/ground but still won’t communicate, consider reprogramming/coding per manufacturer procedure. Replacing the ARC module should be a last step after verifying wiring and bus integrity.
  9. After repair or module replacement, clear codes and perform a road test or function test to confirm communication and functionality. Re-scan for recurrent codes.

Likely causes

  • Damaged connector pins or corrosion at ARC module connector
  • High resistance/poor ground at ARC module or common ground point
  • CAN high/low shorted to each other, to battery, or to ground near ARC module
  • Module powered but held in bus-off due to another node fault
  • ARC module internal hardware/software failure

Fault status

⚠️ Status
Lost Communication With Active Roll Control Module — ARC module not responding on vehicle network. Stability/roll-control systems may be disabled or operating in fallback mode.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0100 U0121 U0140 U0155 U0201
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

U0133

LAND ROVER U — Network/User

Lost communication with the dynamic response module

Brand: LAND ROVER
Type: U — Network/User
Views: UK: 2 EN: 12 RU: 3
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open, shorted or corroded wiring or connectors to the ARC module
  • Power or ground supply failure to the ARC module
  • Faulty ARC module (internal failure)
  • Vehicle network (CAN/LIN) fault or bus-off condition
  • Missing or incorrect module programming/coding after replacement
  • Intermittent connections (water intrusion, broken wire strands)

Symptoms

  • ABS/ESC/traction control warning lamp or stability message illuminated
  • Roll-control or suspension-related warning message on instrument cluster
  • Loss or reduction of active roll control function; vehicle may feel less stable in quick lane changes
  • Related adaptive suspension features disabled
  • Stored network communication codes in scan tool

What to check

  • Connect a capable scan tool. Verify U0133 and any related U-codes; note freeze frame and occurrence count
  • Check for presence of the ARC module on the network via the scan tool (module ID, addressable)
  • Inspect ARC module connector for corrosion, bent pins, water ingress and secure locking
  • Verify module supply voltage at connector (battery voltage with ignition on) and ground integrity
  • Measure CAN bus voltages at module connector: CAN_H, CAN_L and differential
  • Measure resistance across CAN_H to CAN_L with ignition off (check termination ~60 ohms total)

Signal parameters

  • Module supply voltage: battery voltage (approx. 11–14.5 V with ignition on)
  • Ground: low resistance to battery negative (
  • CAN bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (each to chassis); differential near 0 V at idle, ±1 V during activity
  • CAN bus termination resistance: ~60 ohms measured between CAN_H and CAN_L at two-wire terminated network (two 120 Ω in parallel)
  • Short checks: no direct short to battery or ground on CAN_H or CAN_L

Diagnostic algorithm

  1. Retrieve all stored codes and freeze frame with a scan tool. Note any other network or module-specific codes.
  2. Attempt to communicate with the ARC module. If communication is intermittent, do a continuous monitor while performing wiggle tests on the harness and connectors.
  3. Visually inspect ARC module connector and harness for damage, corrosion, or moisture. Repair or replace damaged connectors as needed.
  4. Verify power and ground at the ARC module connector. Repair any open/poor circuits (check fuses, relays, and ground points).
  5. Backprobe CAN_H and CAN_L at the ARC connector. With ignition on, record voltages and verify termination resistance with ignition off.
  6. If bus voltages or termination are out of range, isolate and repair short/open. Disconnect other modules one at a time (if safe) to identify a faulty node causing bus issues.
  7. Check for a module in bus-off state via scan tool; clear codes and attempt to reinitialize the bus. If a module goes bus-off immediately, track wiring or node causing the condition.
  8. If wiring and network checks are good and the module receives proper power/ground but still won’t communicate, consider reprogramming/coding per manufacturer procedure. Replacing the ARC module should be a last step after verifying wiring and bus integrity.
  9. After repair or module replacement, clear codes and perform a road test or function test to confirm communication and functionality. Re-scan for recurrent codes.

Likely causes

  • Damaged connector pins or corrosion at ARC module connector
  • High resistance/poor ground at ARC module or common ground point
  • CAN high/low shorted to each other, to battery, or to ground near ARC module
  • Module powered but held in bus-off due to another node fault
  • ARC module internal hardware/software failure

Fault status

⚠️ Status
Lost Communication With Active Roll Control Module — ARC module not responding on vehicle network. Stability/roll-control systems may be disabled or operating in fallback mode.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0100 U0121 U0140 U0155 U0201
Workshop Manuals

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Workshop Manual
Defender 300Tdi Years: 1996 Manual in English 7.5 MB
Short description

Official workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.

199,00 UAH
Contents
Key sections:
  • 01 INTRODUCTION
  • 04 GENERAL SPECIFICATION DATA
  • 05 ENGINE TUNING DATA
  • 07 GENERAL FITTING REMINDERS
  • 09 LUBRICANTS, FLUIDS AND CAPACITIES
  • 10 MAINTENANCE
  • 12 ENGINE Tdi
  • - Description and operation
  • - Fault diagnosis
  • - Adjustment
  • - Repair and overhaul procedures
  • 19 FUEL SYSTEM Tdi
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Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)

Workshop Manual
Defender Years: 1999–2002 Manual in English 7.6 MB
Short description

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199,00 UAH
Contents
Key sections:
  • 01 - INTRODUCTION
  • - Introduction
  • - Dimensions
  • - References
  • - Repairs and replacements
  • - Poisonous substances
  • - Fuel handling precautions
  • - Synthetic rubber
  • - Recommended sealants
  • - Used engine oil precautions
  • - Accessories and conversions
  • - Wheels and tyres
Buy

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Workshop Manual
Manual in English Pages: 494 7.1 MB
Short description

Land Rover Range Rover Electrical Library (LRL 0453ENG). Comprehensive manual covering fuse details, earth points, system descriptions, diagnostics and connector pin-outs for electrical troubleshooting and repair. Intended for technicians and service workshops.

199,00 UAH
Contents
Key sections:
  • 1 INTRODUCTION
  • 1.1 About this document
  • 1.2 Battery voltage
  • 1.3 Electrical precautions
  • 1.4 Battery disconnecting / charging
  • 1.5 Disciplines / greases
  • 1.6 Abbreviations
  • 1.7 HeVAC, sensors abbreviations
  • 1.8 How to use this document
  • 1.9 Connector detail format
  • 1.10 Fault diagnosis
  • 1.11 Wire colour codes
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