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Home / DTC / C2309 — Yaw Rate Sensor Communication Failure

C2309 — Yaw Rate Sensor Communication Failure

Detailed page for trouble code C2309.

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Code

C2309

Generic C — Chassis

Yaw Rate Sensor Communication Failure

Brand: Generic
Type: C — Chassis
Views: UK: 1 EN: 5 RU: 2
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open, shorted, or damaged wiring between sensor and control module
  • Corroded or loose connector contacts
  • Failed yaw rate (inertial) sensor
  • Loss of power or ground to the sensor
  • CAN/LIN/serial bus communication fault or ECU network error
  • Module software or calibration issue

Symptoms

  • ESC/Traction Control/ABS warning lamp illuminated
  • Stability control intervention disabled or reduced functionality
  • Stored C2309 (and possibly other network or sensor codes)
  • Loss of yaw rate live data or implausible (stuck/zero/spiking) yaw readings
  • Possible degraded vehicle handling or unexpected ABS behavior

What to check

  • Read all stored DTCs and freeze frame data with a capable scan tool
  • Check for related network codes (U0xxx, C1xxx) and other wheel speed or yaw codes
  • Observe live yaw rate sensor data while steering and comparing to steering angle/wheel speed
  • Inspect sensor connector and wiring for damage, corrosion, or moisture
  • Check sensor supply voltage and ground at the connector (key on, engine off)
  • Check CAN/LIN bus health (voltage levels, termination, message rates) if sensor uses network comms

Signal parameters

  • Typical interface: digital network message (CAN/LIN) or dedicated digital/SENT output—depends on vehicle
  • Message/sample rate commonly 10–100 Hz (varies by manufacturer)
  • Payload: yaw rate reported in degrees/sec (or radians/sec) with a manufacturer scale factor
  • If sensor is analog/ratiometric on some vehicles: bipolar or centered voltage (often near half-supply) that changes with left/right rotation
  • Exact voltages, CAN IDs, and scale factors are manufacturer-specific—consult service manual or wiring diagrams

Diagnostic algorithm

  1. Confirm the code with a scan tool and record freeze frame and related codes.
  2. View live yaw rate data and compare to steering wheel angle or vehicle rotation during a low-speed turn to confirm absence, implausible values, or erratic behavior.
  3. Inspect the sensor connector and harness for corrosion, bent pins, breaks, or water intrusion. Repair as needed.
  4. With key on, backprobe the sensor connector: verify reference supply (if present), ground continuity, and expected network voltage levels. Repair open/shorts.
  5. Check continuity/resistance of wiring to the control module. Repair or replace damaged sections.
  6. If the sensor uses CAN/LIN, check bus termination and use a scope/scan tool to confirm the sensor’s CAN messages or presence of the ECU on the bus.
  7. Swap with a known-good sensor (if available) or substitute a verified module to isolate sensor vs module fault.
  8. Update or reflash control module software/calibration if manufacturer service information indicates a known software issue.
  9. Clear codes and perform a road test to confirm the repair. Re-scan for recurrence and re-check live data.
  10. If issue persists after wiring and sensor replacement, consider control module diagnosis or replacement per manufacturer procedures.

Likely causes

  • Poor connector contact or corrosion at the sensor or ABS/ESP module
  • Broken wire or chafed harness causing intermittent signal
  • Yaw rate sensor internal electronics failure
  • Blown fuse or missing sensor supply/ground
  • CAN bus short or high resistance causing message loss
  • Control module fault or software anomaly

Fault status

⚠️ Status
Yaw Rate Sensor Communication Failure — invalid or missing yaw rate data to stability control/ABS module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 3 hours

Similar codes

C2310 C1231 C1201 U0100 U0073 P0500
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Code

C2309

HYUNDAI C — Chassis

Steering Angle Sensor Circuit Malfunction

Brand: HYUNDAI
Type: C — Chassis
Views: UK: 12 EN: 10 RU: 12
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open, shorted, or damaged wiring between sensor and control module
  • Corroded or loose connector contacts
  • Failed yaw rate (inertial) sensor
  • Loss of power or ground to the sensor
  • CAN/LIN/serial bus communication fault or ECU network error
  • Module software or calibration issue

Symptoms

  • ESC/Traction Control/ABS warning lamp illuminated
  • Stability control intervention disabled or reduced functionality
  • Stored C2309 (and possibly other network or sensor codes)
  • Loss of yaw rate live data or implausible (stuck/zero/spiking) yaw readings
  • Possible degraded vehicle handling or unexpected ABS behavior

What to check

  • Read all stored DTCs and freeze frame data with a capable scan tool
  • Check for related network codes (U0xxx, C1xxx) and other wheel speed or yaw codes
  • Observe live yaw rate sensor data while steering and comparing to steering angle/wheel speed
  • Inspect sensor connector and wiring for damage, corrosion, or moisture
  • Check sensor supply voltage and ground at the connector (key on, engine off)
  • Check CAN/LIN bus health (voltage levels, termination, message rates) if sensor uses network comms

Signal parameters

  • Typical interface: digital network message (CAN/LIN) or dedicated digital/SENT output—depends on vehicle
  • Message/sample rate commonly 10–100 Hz (varies by manufacturer)
  • Payload: yaw rate reported in degrees/sec (or radians/sec) with a manufacturer scale factor
  • If sensor is analog/ratiometric on some vehicles: bipolar or centered voltage (often near half-supply) that changes with left/right rotation
  • Exact voltages, CAN IDs, and scale factors are manufacturer-specific—consult service manual or wiring diagrams

Diagnostic algorithm

  1. Confirm the code with a scan tool and record freeze frame and related codes.
  2. View live yaw rate data and compare to steering wheel angle or vehicle rotation during a low-speed turn to confirm absence, implausible values, or erratic behavior.
  3. Inspect the sensor connector and harness for corrosion, bent pins, breaks, or water intrusion. Repair as needed.
  4. With key on, backprobe the sensor connector: verify reference supply (if present), ground continuity, and expected network voltage levels. Repair open/shorts.
  5. Check continuity/resistance of wiring to the control module. Repair or replace damaged sections.
  6. If the sensor uses CAN/LIN, check bus termination and use a scope/scan tool to confirm the sensor’s CAN messages or presence of the ECU on the bus.
  7. Swap with a known-good sensor (if available) or substitute a verified module to isolate sensor vs module fault.
  8. Update or reflash control module software/calibration if manufacturer service information indicates a known software issue.
  9. Clear codes and perform a road test to confirm the repair. Re-scan for recurrence and re-check live data.
  10. If issue persists after wiring and sensor replacement, consider control module diagnosis or replacement per manufacturer procedures.

Likely causes

  • Poor connector contact or corrosion at the sensor or ABS/ESP module
  • Broken wire or chafed harness causing intermittent signal
  • Yaw rate sensor internal electronics failure
  • Blown fuse or missing sensor supply/ground
  • CAN bus short or high resistance causing message loss
  • Control module fault or software anomaly

Fault status

⚠️ Status
Yaw Rate Sensor Communication Failure — invalid or missing yaw rate data to stability control/ABS module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 3 hours

Similar codes

C2310 C1231 C1201 U0100 U0073 P0500
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