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C162385 — CAN Time-out Steering Angle Sensor

Detailed page for trouble code C162385.

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Code

C162385

HYUNDAI C — Chassis

CAN Time-out Steering Angle Sensor

Brand: HYUNDAI
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Page language: EN

Causes

  • Open or short in CANH/CANL wiring between SAS and CAN network
  • Loose, corroded or damaged connector at the steering angle sensor or BCM
  • Failed steering angle sensor (SAS) module
  • Faulty clockspring/spiral cable or damaged steering column wiring
  • Blown fuse or loss of power/ground to the SAS
  • Intermittent or dominant CAN bus fault (short to Vb or ground)

Symptoms

  • Steering angle data unavailable or incorrect in vehicle systems
  • Warning lights illuminated (ESC, ABS, VSM, or steering-related warnings)
  • Vehicle stability/traction control disabled or degraded
  • Steering-related features (lane-keeping, adaptive systems) not available
  • Fault stored in vehicle diagnostic memory; possible limp/limited functionality of stability systems

What to check

  • Read all modules with a capable scan tool; confirm C162385 and note freeze-frame/data and whether SAS appears on network
  • Check for additional U0xxx or C16xxx communication codes (gateway/BCM issues)
  • Visually inspect SAS connector, steering column harness, and clockspring for damage or corrosion
  • Confirm fuses and power/ground at SAS connector with ignition ON and key OFF as required by OEM
  • Measure CANH and CANL voltages at SAS connector with a multimeter/scope (see signal_params)
  • Perform resistance check across CANH-CANL with ignition off to verify termination (~60 ohms)

Signal parameters

  • CANH idle ≈ 2.5 V; CANL idle ≈ 2.5 V. During bus activity CANH typically rises ≈ +1 V and CANL falls ≈ −1 V relative to idle (so differential swings ~2 V)
  • Resistance across CANH–CANL with ignition OFF ≈ 60 Ω (two 120 Ω terminators in parallel)
  • Expected message presence: steering angle messages are periodically broadcast — absence indicates timeout (use OEM scan tool to view message rate)
  • Supply voltage to SAS (check vehicle-specific harness, typically ignition-switched 12 V)
  • Ground continuity from SAS ground pin to chassis ground should be low (near 0 Ω)

Diagnostic algorithm

  1. Connect full-function scan tool and confirm C162385; record freeze-frame, module list and any related U/C codes.
  2. Attempt to communicate directly with the steering angle sensor module. If the module is reachable, view live steering angle messages and compare to expectations.
  3. Inspect visually: connectors, pin damage, corrosion, steering column harness, and clockspring/spiral cable condition. Repair/secure any obvious faults.
  4. Verify power and ground at the SAS connector (with ignition ON per OEM procedure). Replace or repair blown fuses or poor grounds.
  5. Measure CANH and CANL at the SAS connector with ignition ON: verify idle voltages (~2.5 V each) and that bus activity occurs when other modules talk. If both lines are shorted to battery or ground, trace and repair.
  6. With ignition OFF, measure resistance across CANH–CANL; expect about 60 Ω. If open or very high, suspect open circuit/connector. If very low (
  7. Use an oscilloscope to check CAN waveforms while exercising systems that should broadcast steering angle. Look for missing messages, excessive noise, dominant bus state, or corrupted frames.
  8. Wiggle-test harness/clock spring/steering wheel while monitoring live data to locate intermittent breaks; repair wiring or replace clockspring as required. Take airbag/steering wheel safety precautions when servicing the clockspring.
  9. If wiring/power/ground and bus integrity are confirmed, consider SAS module internal failure—replace module per OEM procedure and perform any required calibration/relearn of steering angle and stability systems.
  10. After repairs, clear codes, perform relearn/calibration procedures required by the manufacturer, and road test while monitoring live data to confirm no recurrence.

Likely causes

  • Damaged/poor connector at SAS or steering column (common)
  • Broken or chafed CAN pair inside steering column / clockspring (common with steering wheel work)
  • Failed steering angle sensor module
  • Open/shorted CAN bus caused by aftermarket device or recent repair
  • Missing power or blown fuse to SAS

Fault status

⚠️ Status
CAN Time-out — Steering Angle Sensor (C162385): The vehicle detected no CAN bus messages from the steering angle sensor module within the expected time window. Check CAN bus wiring, power/ground, connectors, clockspring, and module communication.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

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