C1B0A

Code

Generic C — Chassis

Yaw Rate Sensor Range/Performance Fault

Brand: Generic

Type: C — Chassis

Views: UK: 10 EN: 9 RU: 9

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Page language: EN

Causes

Yaw rate (yaw rate/rotational) sensor failure
Damaged or corroded sensor connector or wiring (open, short to voltage/ground)
Poor sensor power or ground (intermittent supply)
Loss of CAN/communications between sensor/ABS/ESC module and vehicle network
Sensor misalignment, loose mounting or physical damage from impact
Steering angle sensor disagreement or calibration fault

Symptoms

Electronic Stability Control (ESC) or Traction Control warning lamp illuminated
ABS or stability-related warning lights on instrument cluster
Stability or traction assist disabled; reduced vehicle handling interventions
Unexpected braking or stability interventions during cornering
Stored diagnostic trouble code C1B0A and possibly related ABS/ESP codes
Vehicle may feel less stable during steering inputs

What to check

Read and record C1B0A and any related codes (ABS, steering angle, CAN U-codes). Save freeze frame data and live data if available.
Verify whether the code is current or historic; check pending events and how many times it set.
Visually inspect yaw sensor and its mounting for damage, contamination, loose fasteners or misalignment.
Inspect sensor connector for corrosion, bent terminals, water intrusion and check that it is fully seated.
Inspect wiring harness along routing for chafing, pinches, or repairs. Pay attention near steering column, suspension and firewall.
Check battery voltage is within specification and main power/ground connections to ABS/ESC module are secure.

Signal parameters

Yaw rate sensor supply: typically 5 V reference (check vehicle-specific spec)
Ground continuity: near 0 Ω between sensor ground and chassis ground
Signal output: yaw rate in deg/s (0 deg/s at straight line; positive/negative deflections when turning)
Signal waveform: analog voltage or digital CAN message depending on vehicle; expected stable value when straight and responsive during turns
CAN/serial: ABS/ESC module should publish yaw rate message at defined rate (example: 10–100 Hz depending on system)
Typical idle/straight value: ~0 deg/s (small noise tolerance per manufacturer)

Diagnostic algorithm

Connect a diagnostic scanner with live-data capability. Read and record C1B0A and any accompanying codes; note freeze frame and live yaw rate values.
Verify if the yaw rate reading in live data is plausible: near 0 deg/s when straight, responsive during left/right turns. If reading is erratic or fixed, proceed.
Visually inspect sensor and mount for damage or looseness. Ensure sensor is correctly oriented and fasteners are torqued to spec.
Inspect connector and wiring for corrosion, water ingress, broken pins, or poor fit. Wiggle harness while watching live data for intermittents.
Measure sensor supply and ground at the connector with a DMM: verify reference voltage (usually 5 V) and a good ground. Check for intermittent supply under load or key cycles.
If the sensor outputs an analog voltage, use an oscilloscope to view signal during static and dynamic conditions (straight and during slow turns). Compare amplitude and noise to expected behavior.
If the sensor is a CAN device, verify CAN bus operation: check bus voltages, termination, and that ABS/ESC module is communicating. Use a scope or CAN analyzer to confirm yaw rate messages and timestamps.
Cross-check steering angle sensor and wheel speed sensors live data. Large discrepancies can cause ESC module to flag yaw sensor performance.
If wiring and power/ground/CAN are good but readings are incorrect, replace the yaw rate sensor per manufacturer procedure. Use a known-good sensor or perform bench test if available.
After repair or replacement, perform any required sensor/module calibration or adaptation (steering angle and yaw/ESC relearn) using factory scanner.
Clear codes, perform a controlled road test with diagnostic tool connected, and confirm yaw rate behaves correctly and C1B0A does not return.

Likely causes

Corroded/loose connector at yaw sensor or ABS/ESC module
Wiring chafed near suspension/steering or at body harness entry points
Failed yaw rate sensor (internal MEMS failure)
Lost CAN communication to ABS/ESC module due to module fault or bus issue
Sensor was disturbed and requires recalibration after service

Fault status

⚠️ Status

Yaw Rate Sensor Range/Performance Fault — the ESC/ABS control module has detected the yaw rate sensor output is out of expected range or not responding correctly. Vehicle stability control functions may be disabled until the issue is resolved.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2 hours