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Home / DTC / C0605 — Steering Wheel Angle Sensor Circuit/Open

C0605 — Steering Wheel Angle Sensor Circuit/Open

Detailed page for trouble code C0605.

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C0605

Generic C — Chassis

Steering Wheel Angle Sensor Circuit/Open

Brand: Generic
Type: C — Chassis
Views: UK: 16 EN: 26 RU: 22
AI status
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Page language: EN

Causes

  • Broken, corroded or disconnected wiring/connectors between SWA sensor and control module
  • Failed steering wheel angle sensor
  • Damaged or worn clock spring (spiral cable) in the steering column
  • Poor ground or lost 5V reference supply to the sensor
  • Connector pushed out, bent pins or water intrusion
  • Aftermarket steering wheel or airbag removal reassembly issue

Symptoms

  • Traction control, ESC or ABS warning lamp illuminated
  • Loss or disable of stability control and/or cruise control functions
  • Steering angle reading missing, erratic or stuck at center in scan tool live data
  • Possible intermittent fault depending on wheel position or vibration
  • Auto-leveling or driver assistance systems using SWA may be degraded or disabled

What to check

  • Read and record freeze frame and related DTCs from ABS/ESC/airbag modules
  • Inspect steering column area for damaged wiring, pinched harness or disconnected connectors
  • Visually inspect clock spring and airbag/steering wheel connectors for damage
  • Backprobe sensor connector: check for 5V reference, ground and signal presence
  • Measure continuity between sensor pins and control module pins with steering straight and with wheel turned (careful to avoid over-rotating clock spring)
  • Check for water ingress, corrosion, bent pins at connectors

Signal parameters

  • Typical reference voltage: ~5.0 V (check manufacturer spec)
  • Typical signal type: analog or digital angle output; many SWA sensors provide two channels (sine/cosine) ~0.5–4.5 V with ~2.5 V offset
  • Open-circuit condition: no signal/voltage changes or sensor output reads OL/— on scan tool
  • CAN/lin variants: module may transmit angle as a message; loss appears as invalid or frozen value
  • Rotation response: signal should change smoothly with wheel rotation; A/B channels 90° out of phase for incremental encoders

Diagnostic algorithm

  1. Verify stored codes and see if related modules (ABS, ESC, EPS, airbag) have additional DTCs.
  2. With ignition ON, use a scan tool to view SWA sensor live data. Note reported angle value and whether it changes when wheel is rotated slowly.
  3. Inspect connectors and wiring from steering wheel/column to the control module. Look for pin damage, corrosion, or broken wires at the clock spring harness.
  4. Backprobe the sensor connector: confirm 5 V reference (or specified supply), ground continuity, and measure signal while slowly rotating the wheel. No supply or no signal change indicates open circuit or failed sensor.
  5. Perform continuity/resistance checks between sensor connector and module connector with column straight; operate steering slowly and check for intermittent opens (wiggle test).
  6. If wiring and supplies are good but signal is missing or out of spec, remove and bench-test or replace SWA sensor per vehicle procedure.
  7. If clock spring is suspected (intermittent/open only when wheel turned), remove steering wheel and inspect/replace clock spring following SRS safety procedures.
  8. After repair or replacement, clear codes and perform required steering angle sensor calibration/initialization with a scan tool per manufacturer procedure.
  9. Road test and recheck for DTC reappearance and proper operation of stability/cruise systems.

Likely causes

  • Open wire or broken conductor in harness through the steering column/clock spring
  • Clock spring internal break after steering wheel removal or repeated turn cycles
  • Corroded/contaminated connector at the sensor or module
  • Sensor element failure (internal open)
  • Missing or poor ground at sensor or module

Fault status

⚠️ Status
Steering Wheel Angle Sensor Circuit/Open — open or broken circuit detected in the steering wheel angle sensor wiring or sensor. Stability control and related functions may be disabled until repaired.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

C0600 C0606 C0610 C0035 U0415
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