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Home / DTC / U0130 — Lost Communication With Steering Effort Control Module

U0130 — Lost Communication With Steering Effort Control Module

Detailed page for trouble code U0130.

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U0130

Generic U — Network/User

Lost Communication With Steering Effort Control Module

Brand: Generic
Type: U — Network/User
Views: UK: 21 EN: 30 RU: 18
AI status
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Page language: EN

Causes

  • Open or shorted CAN/LIN communication wiring between modules
  • Steering Effort Control Module has lost power or ground
  • Blown fuse or disconnected power feed to the module
  • Corroded, bent or pushed-out connector pins at the module or junctions
  • Faulty Steering Effort Control Module (internal failure)
  • Network bus termination problem or multiple modules causing bus-off

Symptoms

  • Steering assist reduced, unavailable, or operating in limp mode
  • Steering/traction/ABS warning lamp or message displayed
  • Service message: Steering System/Assist Unavailable or similar
  • No response from Steering Effort Control Module in diagnostic scan
  • Multiple network communication DTCs present
  • Intermittent or permanent loss of advanced steering features

What to check

  • Connect a capable scan tool; read all U-codes and available module list
  • Verify battery voltage is within specification (engine off and cranking)
  • Inspect fuses and relays for the steering module and network
  • Visually inspect connectors and wiring at the steering module and nearby harnesses
  • Check for other modules reporting COMM faults (helps locate bus section)
  • Measure CAN High/CAN Low voltages and compare to nominal values

Signal parameters

  • CAN High idle (recessive) ~2.5 V; dominant CAN_H ~3.5 V
  • CAN Low idle (recessive) ~2.5 V; dominant CAN_L ~1.5 V
  • Differential CAN voltage when active ≈ 2.0 V (dominant state)
  • Termination resistance between CAN_H and CAN_L ≈ 60 Ω (two 120 Ω resistors in parallel)
  • Module supply voltage (B+) at harness connector ≈ battery voltage
  • Module ground continuity to chassis ≈ near 0 Ω

Diagnostic algorithm

  1. Retrieve and record all DTCs and freeze-frame data from all modules. Note any other U-codes.
  2. Verify battery voltage and load-test battery if low; poor battery voltage can cause network faults.
  3. Check fuses/relays for the steering module and repair/replace as needed.
  4. Visually inspect the steering module connector and harness for corrosion, bent pins, loose terminals, or water damage; repair as needed.
  5. Using a multimeter, verify power and ground at the steering module connector. Repair any open/high-resistance circuits.
  6. With vehicle ignition on, measure CAN_H and CAN_L at the steering module connector and at other nodes. Look for invalid or no bus activity.
  7. Measure termination resistance between CAN_H and CAN_L with power off. If not ~60 Ω, inspect termination resistors and wiring.
  8. If bus is shorted to battery or ground, isolate sections: unplug suspected modules/junctions one at a time and watch for return of normal bus activity.
  9. If intermittent, perform wiggle tests and stress harness sections while monitoring the bus for fault changes or module appearance/disappearance.
  10. Use an oscilloscope or good CAN bus analyzer to examine waveforms for noise, dominant/continuous states, or malformed frames.
  11. If wiring and power/ground are good and other modules communicate normally, consider replacement or reprogramming of the steering effort control module per manufacturer procedures.
  12. After repairs, clear DTCs and confirm permanent disappearance of U0130 and return of normal steering module messages and function.

Likely causes

  • Broken/shorted CAN High or CAN Low at steering module connector
  • Missing battery voltage or engine-switched power to the steering module
  • High resistance or open ground at module causing loss of comms
  • Corroded connector pin or harness damage near steering column
  • Module in bus-off state due to repeated errors or short
  • Faulty fuse or relay supplying the steering module

Fault status

⚠️ Status
Lost communication with the Steering Effort Control Module — no valid messages received on the vehicle communication bus from that module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-3 hours

Similar codes

U0100 U0121 U0122 U0140 U0155 U0073
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