U1205

Code

DS U — Network/User

Fault in the information received by the steering wheel angle sensor over the CAN network: Value received incorrect

Brand: DS

Type: U — Network/User

Views: UK: 2 EN: 2 RU: 3

AI status

Completed

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Page language: EN

ESP/ESC or ABS warning lamp illuminated
Steering assist or stability systems degraded or disabled
Adaptive cruise/driver assistance features unavailable or behaving incorrectly
Stored U1205 and possibly related U-codes
Steering angle display (if available) shows erratic values or doesn't change with wheel movement

Read all stored and pending DTCs, note freeze-frame and occurrence frequency
Scan live data for steering angle sensor value while rotating the wheel; check for jumps, static value, or out-of-range numbers
Check battery voltage and charging system stability
Visually inspect connectors at the steering angle sensor, clockspring/spiral cable, steering column and related modules
Inspect CAN High/Low wiring and grounds for damage, corrosion, or poor routing near moving parts
Perform a CAN bus health check: measure voltages, check for correct termination and differential waveform with scope if available

Message type: CAN (vehicle network) – steering angle message ID varies by vehicle
Data content: steering wheel angle value (signed), may be in degrees or normalized units
Expected behavior: smooth, monotonic change as wheel is turned; no sudden jumps or frozen values
Typical angle range: manufacturer-specific (commonly tens to hundreds of degrees either direction); values outside expected range flagged as invalid
Update rate: periodic (several Hz) or event-driven; loss of updates >1–2 s is abnormal
Voltage/power: sensor requires stable 12 V supply and good ground; CAN bus differential idle voltage ~2.5 V with valid differential signaling

Confirm U1205 is present and note additional U/C/B codes. Clear codes and attempt to reproduce; check if code returns and under what conditions.
Use a scan tool to monitor live steering angle values while slowly turning the wheel from lock to lock. Note any discontinuities, frozen readings, or values outside the expected range.
Inspect connectors and wiring at the steering angle sensor, clockspring (spiral cable) and steering column for damage, corrosion or loose pins. Repair as needed.
Backprobe power and ground at the sensor to verify stable supply voltage during operation. Check continuity to module grounds.
Check CAN bus integrity: measure CAN high/low voltages, check for correct termination resistances and use an oscilloscope to inspect for noise or distorted waveforms.
If network shows other module errors, isolate which module is transmitting bad data by monitoring CAN frames (manufacturer tool may show message sender).
If wiring and network are good, replace or bench-test the steering angle sensor per manufacturer procedure. After replacement, perform steering angle zero/calibration (relearn) using a diagnostic tool.
Update module software or reflash modules if the control module reports incompatible data formats after recent replacements.
After repairs, clear codes and perform a road test and live-data verification to ensure the angle values track smoothly and no recurrence of U1205.

Connector wiring issue (clock spring/airbag/steering column connector) causing corrupt data
Intermittent CAN bus fault due to damaged harness or poor termination
Steering angle sensor internal fault (drift or stuck value)
Module software mismatch or missing calibration after replacement

⚠️ Status

Invalid/incorrect steering wheel angle value received over CAN — data out of range or corrupted.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.5 - 3.0 hours

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