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Home / DTC / C1662 — Steering Angle Sensor — Implausible Signal

C1662 — Steering Angle Sensor — Implausible Signal

Detailed page for trouble code C1662.

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C1662

HYUNDAI C — Chassis

Steering Angle Sensor — Implausible Signal

Brand: HYUNDAI
Type: C — Chassis
Views: UK: 21 EN: 30 RU: 30
AI status
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Completed 100%
Page language: EN

Causes

  • Faulty steering angle sensor (internal failure)
  • Poor electrical connection at SAS connector (corrosion, bent pins, water ingress)
  • Damaged wiring harness or short/open circuits between sensor and ABS/ESC module
  • Incorrect or missing sensor calibration/zero offset (after steering or suspension work)
  • Low or unstable battery voltage or poor ground
  • Faulty ABS/ESC control module or CAN communication errors

Symptoms

  • ABS, ESC, or Traction Control warning lamp illuminated
  • Loss or reduction of stability control and traction functions
  • Inconsistent or jumping steering angle reading in live data
  • Incorrect steering wheel angle zero offset (wheel not centered)
  • Vehicle pulls or tracks poorly during stability control events
  • Poor or disabled advanced driver assistance functions that use steering angle

What to check

  • Read and record all stored DTCs and freeze frame data with a capable scan tool
  • Check battery voltage and vehicle grounding (engine off and cranking)
  • Inspect SAS connector and wiring for corrosion, damage, broken wires, or loose pins
  • Observe live data: steering angle sensor output, steering rate, and compare to wheel speed sensors/yaw rate sensor
  • Attempt OEM recommended SAS self-calibration/zero reset with scan tool and note any errors
  • Perform wiggle test on wiring while monitoring live data for intermittent changes

Signal parameters

  • Typical SAS output: angle value (degrees) and angular rate; expected range: approx. ±360° to ±720° total rotation depending on system (check OEM spec)
  • Centered/rest position near 0° when steering wheel is straight (after calibration)
  • Raw sensor voltage (if applicable): centered mid-supply (≈2.5 V) with swing toward 0–5 V extremes — confirm with manufacturer data before relying on absolute voltages
  • Update rate: tens of Hz (real‑time steering input)
  • Compare steering angle vs. calculated vehicle yaw/wheel speed: values should correlate within small tolerance during steady steering maneuvers

Diagnostic algorithm

  1. Retrieve all codes and freeze-frame data; note occurrence conditions (speed, turn, time).
  2. Verify battery voltage and good ground at the ABS/ESC module and SAS connector. Repair any low-voltage/ground issues first.
  3. Visually inspect SAS connector and harness for damage, corrosion, or pin issues. Repair or reconnect securely.
  4. With a scan tool, read SAS live data and compare steering angle to wheel speeds and yaw rate. Look for jumps, implausible values, or no signal.
  5. Perform a wiggle test on the harness while watching live data to find intermittent faults.
  6. Attempt OEM steering angle sensor calibration/zero-point reset. If calibration fails or values remain implausible, proceed to step 7.
  7. If wiring and calibration are good but signal remains implausible, replace the steering angle sensor per manufacturer procedure and recalibrate.
  8. If fault persists after sensor replacement and calibration, investigate ABS/ESC module and CAN network (scan for related U-codes) and consider module replacement only after confirming wiring and sensor integrity.
  9. After repairs, clear codes and perform a road test with live data monitoring to confirm proper steering angle behavior and no recurrence.

Likely causes

  • Faulty or misaligned steering angle sensor
  • Connector corrosion or wiring fault between SAS and ESC/ABS module
  • Sensor not calibrated after steering/suspension work

Fault status

⚠️ Status
Control module detected implausible or inconsistent steering angle sensor data (out-of-range, invalid, or conflicting with other sensor data). ESC/ABS functions may be disabled or limited.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

C1601 C1602 C1660 C1663 U0416
371

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