C2164

Code

Generic C — Chassis

Yaw Rate Sensor Circuit Range/Performance

Brand: Generic

Type: C — Chassis

Views: UK: 9 EN: 18 RU: 12

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Causes

Faulty yaw rate (yaw rate/gyroscope) sensor
Open, short or high-resistance wiring in sensor power, ground or signal circuit
Corroded/loose connector or pins at sensor or ABS/VDC module
Faulty ABS/ESC/VDC control module or internal circuitry
CAN bus/serial communication error between sensor and control module
Sensor contaminated or physically damaged (impact, water intrusion)

Symptoms

Stability control / ESC / VDC warning lamp illuminated
Traction control and ABS indicator lights may be on or flashing
Loss or reduction of vehicle stability control and limited ABS/ESC functionality
Unexpected or aggressive traction/braking intervention during turns
Stored accompanying codes for steering angle sensor, wheel speed sensors, or communication faults

What to check

Read and record all stored DTCs (ABS, airbag, powertrain, body) with a capable scan tool
Inspect yaw rate sensor connector and wiring harness for damage, corrosion, pin push-out, or water intrusion
Check fuses and relays related to ABS/ESC and sensor power circuits
With ignition on, monitor live data: yaw rate signal value (deg/s), sensor supply voltage and signal voltage or CAN messages
Compare yaw rate reading to steering angle/wheel speed: straight-ahead should be ~0 deg/s; yaw should change smoothly during turns
Backprobe sensor harness to measure supply (typically 5 V reference), ground continuity and signal waveform/voltage

Signal parameters

Typical yaw rate sensor interfaces: analog signal (0–5 V) with ~2.5 V zero-rate bias and ± output proportional to deg/s; sensitivity commonly in the range 0.01–0.05 V per °/s (manufacturer specific)
Supply/reference voltage: usually regulated ~5.0 V (check exact spec for vehicle)
Ground: low resistance to chassis (
Digital/CAN sensors: sensor reports yaw rate as a CAN message at a regular update rate (often 10–100+ Hz); idle CAN differential voltage ~2.5 V (CANH/CANL ~2.5 V)
Expected live-data behavior: ~0.0–0.5°/s at straight-ahead, smoothly increasing positive or negative values during left/right yaw; no abrupt spikes or saturation when vehicle is within normal operating maneuvers

Diagnostic algorithm

Verify the code and capture freeze-frame/live data with a scan tool. Note related ABS/ESC or communication codes.
Visual inspection: inspect sensor location, mounting, connector for corrosion, damage, water ingress or loose mounting. Repair as needed.
Check power and ground: with key on, backprobe sensor connector and verify reference supply voltage (≈5 V) and a good ground. Repair wiring if supply/ground is out of spec.
Check signal: measure signal voltage at rest (straight wheels) and while slowly rotating vehicle or rotating the vehicle on a lift (careful, follow safe procedures). For analog sensors expect ~2.5 V at 0 deg/s and a smooth change during rotation. For CAN sensors, verify the CAN messages and update rate with a tool.
Wiggle/stress test: with backprobed connectors, wiggle harness and connectors while watching live data for intermittent faults. Repair or replace damaged harness/connector.
Check continuity/resistance for signal, power and ground circuits to the ABS/ESC module. Repair any opens/shorts or high resistance connections.
Inspect ABS/ESC module connectors and scan module for internal faults or communications errors. Check for TSBs/firmware updates or required sensor recalibration.
If wiring and power/ground are good but signal remains invalid, replace yaw rate sensor and clear codes. Re-test to confirm proper operation and that codes do not return.
If new sensor does not correct the issue, suspect ABS/ESC module input stage or CAN bus faults. Further module bench testing or replacement may be required by a qualified technician.