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Home / DTC / U1205 — Yaw rate/G message counter error

U1205 — Yaw rate/G message counter error

Detailed page for trouble code U1205.

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Code

U1205

MITSUBISHI U — Network/User

Yaw rate/G message counter error

Brand: MITSUBISHI
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty yaw rate (gyroscope) or lateral‑G sensor
  • Intermittent or failed CAN/LIN wiring or connectors between sensor and ECU
  • Corroded or loose ground/power supply to sensor or control module
  • Faulty ABS/ESP (VDC) control module or other gateway module
  • Software mismatch, corrupted firmware, or message formatting bug
  • Low battery voltage or supply fluctuations during message transmission

Symptoms

  • ABS/VDC/ESP warning lamp or traction control light illuminated
  • Reduced or disabled stability/traction control functions
  • Possible drivability complaints only when stability control intervenes
  • Multiple network communication DTCs present
  • Inconsistent or missing yaw rate/G live data on scan tool

What to check

  • Read and record all stored and pending codes and freeze frame data
  • Check live data for yaw rate and lateral‑G values and whether they update
  • Inspect wiring and connectors at yaw rate sensor, ABS/ESP module and gateway modules
  • Check battery voltage and charging system while scanning (stable >12V during start/run)
  • Perform a wiggle test on harness while watching live data for interruptions
  • Use a CAN bus analyzer/oscilloscope to capture message frames, IDs, counters, CRCs and error frames

Signal parameters

  • CAN ID for yaw rate/G message (manufacturer specific)
  • Message frequency (messages per second)
  • Message counter value (0–15 or manufacturer defined) must increment sequentially
  • Checksum/CRC field (if used) validity
  • Yaw rate (deg/s) live value — should change with vehicle rotation
  • Lateral acceleration (g) live value — should change during cornering

Diagnostic algorithm

  1. Retrieve U1205 and any related network codes; document freeze frame and live yaw rate/G values.
  2. Inspect sensor connector, pins and wiring for damage, corrosion or water intrusion; repair as needed.
  3. Verify proper power and ground at the yaw rate sensor and at the ABS/ESP module; repair poor grounds.
  4. Monitor live yaw rate/G data while operating vehicle slowly and perform a wiggle test to see if data drops or counter changes incorrectly.
  5. Use a CAN bus diagnostic tool or scope to capture the yaw rate message frames; confirm message ID, data length, counter increment pattern and checksum correctness.
  6. If wiring and bus integrity are good but counter or message contents are invalid, swap or bench‑test the yaw rate sensor (if possible) or replace with known good unit.
  7. If replacing sensor does not clear the issue, inspect/replace the ABS/ESP or gateway module as directed by manufacturer diagnostics.
  8. After repairs, clear codes and perform a road test to ensure message counter is valid and no related codes return. Check for software/ECU updates and apply if recommended.

Likely causes

  • Damaged sensor connector or wiring harness (pin corrosion, bent pins, chafing)
  • Poor ground at sensor or ECU causing data corruption
  • Failed yaw rate sensor internal counter/firmware
  • Intermittent CAN bus fault (short to ground, open, or high resistance)
  • Control module with failed comms or internal memory error

Fault status

⚠️ Status
Yaw rate/G message counter error — the received yaw rate/lateral‑G message counter is invalid or out of sequence, indicating a communication integrity or sensor/module fault affecting vehicle stability systems.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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