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Home / DTC / C2343 — Steering Angle Sensor Circuit Intermittent

C2343 — Steering Angle Sensor Circuit Intermittent

Detailed page for trouble code C2343.

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C2343

Generic C — Chassis

Steering Angle Sensor Circuit Intermittent

Brand: Generic
Type: C — Chassis
Views: UK: 2 EN: 2 RU: 3
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Page language: EN

Causes

  • Damaged or corroded wiring/connector between sensor and ABS/ESC module
  • Faulty steering angle sensor (SAS)
  • Defective clock spring (spiral cable) in steering column
  • Poor ground or intermittent power supply to sensor
  • Water ingress or contamination at connector
  • Intermittent module-to-module communication (CAN bus)

Symptoms

  • ABS, ESC or traction control warning lamp illuminated intermittently
  • Inconsistent or jumping steering angle value in scan tool/live data
  • Loss of stability/traction control when SAS data is lost
  • Steering wheel centering/recognition errors or required steering angle relearn message
  • Possible related communication codes for ABS or body control modules

What to check

  • Read and record all related DTCs and freeze-frame data from ABS/ESC and gateway modules
  • Scan live steering angle sensor data while at rest and while turning the wheel slowly; note dropouts, spikes, or jumps
  • Visually inspect steering column wiring, connectors, and sensor for damage, corrosion, or moisture
  • Wiggle test wiring/connector and clock spring while monitoring live data to try to reproduce the intermittent fault
  • Check 5V reference and sensor ground with a DVM; check for intermittent voltage loss
  • Inspect clock spring for mechanical damage and continuity of contacts

Signal parameters

  • Supply/reference: typically 5 V (±0.5 V) reference to sensor — should be steady
  • Ground: low resistance to chassis (≈
  • Output (typical analog/Hall type): center ≈2.5 V; output should vary smoothly between ~0.1–4.9 V with wheel rotation (no sudden jumps)
  • Two-channel sensors: two sinusoidal/analog outputs 90° out of phase (phased signals should be continuous and monotonic)
  • Digital/CAN: steering angle message periodic and steady (no gaps); expected update rate per vehicle (e.g., 10–100 Hz)
  • Resistance/continuity: wiring continuity from sensor connector to ABS/ESC module with no intermittent opens

Diagnostic algorithm

  1. Verify DTC C2343 and related codes using an appropriate scan tool; save freeze-frame and live-data logs.
  2. With ignition on, monitor steering angle value at rest; slowly turn steering wheel and watch for smooth changes. Note any dropouts, spikes, or jumps.
  3. Perform a visual inspection of connectors at the sensor, under-dash harness, and ABS/ESC connector. Look for corrosion, bent pins, moisture, or chafing.
  4. Wiggle test wiring, steering column harness, and clock spring while observing live data to attempt to reproduce the intermittent fault. Securely support steering wheel during test.
  5. Measure sensor supply (5 V ref) and ground with a DVM while performing wiggle test. Look for intermittent loss or voltage deviation.
  6. If available, use an oscilloscope to view sensor outputs while rotating the wheel; look for missing cycles, noise, or abrupt drops indicating intermittent connection or failing sensor.
  7. Check continuity and resistance of the signal, supply and ground wires from the sensor connector to the ABS/ESC module. Repair any damaged wiring or poor pin contact.
  8. Inspect or test the clock spring (spiral cable). Replace if continuity is intermittent or mechanical damage is evident.
  9. Check CAN bus health and other modules for related comms faults; repair bus issues if present.
  10. After repairs replace/repair the failed component (connector, wiring, clock spring, sensor). Clear codes and perform manufacturer-specified steering angle sensor calibration/relearn procedure.
  11. Road test to confirm stability system behavior and monitor for recurrence of the intermittent event.

Likely causes

  • Intermittent wiring/connector fault (broken wire, bent pin, corrosion)
  • Worn or damaged clock spring causing intermittent connection
  • Failing steering angle sensor electronics
  • Intermittent ground or 5V reference supply
  • CAN bus communication dropout

Fault status

⚠️ Status
Intermittent steering angle sensor circuit — occasional loss/corruption of steering angle data to vehicle stability control.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5–2.5 hours

Similar codes

C2340 C2341 C2342 C2344 U0121 U0415
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