C1350

Code

Generic C — Chassis

Yaw Rate Sensor Circuit — Malfunction

Brand: Generic

Type: C — Chassis

Views: UK: 9 EN: 16 RU: 12

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Page language: EN

Causes

Damaged or corroded wiring or connector at the yaw rate sensor
Yaw rate sensor internal failure (MEMS sensor)
Faulty reference power supply (5V/3.3V) or ground to the sensor
Loose or damaged connector pins or poor terminal contact
Intermittent short to battery or ground in sensor circuit
Faulty ABS/ESC control module or internal driver circuit

Symptoms

ABS, ESC, VDC or traction control warning lamp illuminated
Stability or traction control disabled (loss of automatic correction)
Possible stored additional ABS/ESC related fault codes
Vehicle may not intervene correctly during low-traction or over/understeer events
Occasional or persistent fault that may occur at certain temperatures or after movement of wiring

What to check

Read all ABS/ESC and powertrain codes and freeze-frame data with a professional scan tool
Check for related codes (wheel speed, lateral accel, steering angle) that can point to root cause
Visually inspect yaw rate sensor, connector and wiring for damage, corrosion, pin push-out or water ingress
Check sensor mounting — ensure it's secure and positioned per vehicle requirements
With key on (engine off) verify presence of sensor reference voltage (typically 5V or 3.3V) and good ground at sensor connector using a digital multimeter
Backprobe sensor signal and measure output at rest and while turning wheel (expect near 0°/s at rest, change when rotating)

Signal parameters

Sensor type: typically MEMS yaw rate sensor (analog or digital output) or CAN message source
Reference supply: usually 5V or 3.3V regulated reference to sensor (measure at connector)
Ground: solid chassis or signal ground — low resistance to battery negative expected
Signal output: degrees/second (°/s) — about 0°/s when vehicle is straight and stationary; output magnitude and sign change with rotation
Sample rate: sensor or CAN updates typically 10–100 Hz depending on vehicle
Communication: on some systems yaw data is sent over CAN/lin to ABS/ESC or integrated MCU

Diagnostic algorithm

Connect a capable scan tool, read and record all ABS/ESC codes and freeze-frame. Note whether code is permanent or pending.
Inspect sensor location, connector and wiring for obvious damage, corrosion, or water entry. Repair visible faults.
Verify battery voltage and recharge if low. Low system voltage can cause erroneous faults.
With connector attached, backprobe sensor reference pin and measure reference voltage; confirm ground continuity to battery negative.
Backprobe signal pin and monitor live yaw rate reading at rest (should be ~0°/s). Perform a slow yaw input (turn steering or rotate vehicle) and confirm signal changes and directionality.
If no valid signal, disconnect sensor and check resistance/continuity of sensor power/ground/signal circuits back to ABS/ESC module. Check for shorts to power/ground.
If wiring and power/ground are good but signal absent or out-of-range, bench-test or temporarily swap with a known-good sensor (if available) or replace sensor.
If replacement sensor does not clear the fault, suspect module driver or CAN communication; test CAN bus integrity and related modules per manufacturer procedures.
After repairs, clear codes and perform a test drive or dynamic stability test to confirm proper operation and that code does not return.
If fault persists and wiring and sensor are verified good, consult OEM service literature for module-level diagnostics or consider module replacement and programming.

Likely causes

Corroded/damaged connector or wiring between yaw sensor and ABS/ESC module
Yaw rate sensor failure
Loss of sensor reference power or ground
Intermittent connector seating or pin damage

Fault status

⚠️ Status

Yaw Rate Sensor Circuit Malfunction — ABS/ESC has detected invalid or missing yaw rate sensor signal.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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