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Home / DTC / C1122 — Steering Angle Sensor Circuit Range/Performance

C1122 — Steering Angle Sensor Circuit Range/Performance

Detailed page for trouble code C1122.

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C1122

Generic C — Chassis

Steering Angle Sensor Circuit Range/Performance

Brand: Generic
Type: C — Chassis
Views: UK: 0 EN: 0 RU: 0
AI status
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Page language: EN

Causes

  • Faulty steering angle sensor (SAS) or steering angle module
  • Sensor wiring open, short, damaged insulation, or poor pin contact
  • Corroded or loose connector / terminal
  • Failed 5V reference or ground to sensor
  • Faulty ABS/ESC/steering control module or internal failure
  • Sensor misalignment or incorrect center position after steering work

Symptoms

  • Warning lights: ABS, ESC/traction control lamp, or steering warning lamp
  • Loss or reduction of stability/traction control functionality
  • Incorrect steering angle readout or inconsistent steering angle live data
  • Intermittent or permanent disablement of electric power steering assistance (on some vehicles)
  • Need for repeated steering angle relearn after wheel centering

What to check

  • Connect a scan tool and read stored/active codes and freeze frame data; view live steering angle values
  • Verify battery voltage (should be stable around 12–14V) before testing sensors
  • Visually inspect wiring and connector at the steering angle sensor and steering column for damage or corrosion
  • Check fuses and module grounds related to ABS/ESC and steering angle sensor
  • Wiggle test wiring while monitoring live data for intermittent changes or dropouts
  • Confirm CAN/communication is intact (no related U-codes) and that steering module is communicating

Signal parameters

  • Reference supply: typically 5.0 V (check vehicle wiring diagram for exact value)
  • Signal output: typically varying voltage between ~0.5–4.5 V correlating with lock-to-lock steering angle
  • Continuity/Resistance: wiring should show no opens or short to ground/power; expect low resistance to ground only on ground circuits
  • Angle range: live-data steering angle should vary smoothly across full lock-to-lock and report a center position near 0° (vehicles may use ±540° or ±720° counts)
  • CAN messages: steering angle module should transmit consistent angle values with no frequent timeouts

Diagnostic algorithm

  1. Retrieve DTCs and freeze-frame; note whether C1122 is historical or current and if other related codes are present.
  2. Inspect steering column area and sensor connector for physical damage, corrosion, pin deformation or water entry.
  3. With key ON (engine OFF), measure reference voltage and ground at the sensor connector. Verify signal pin voltage while slowly turning the steering wheel; expect a smooth, continuous change.
  4. Perform wiggle test of harness/connector while observing live data for intermittent jumps or dropouts; repair any damaged wiring or connectors.
  5. Check related fuses and module grounds for corrosion or looseness; clean and tighten as required.
  6. If wiring and power/ground are good but signal is implausible, verify communication between ABS/ESC and steering modules with a scan tool; look for U-codes that indicate network faults.
  7. If sensor reads correctly but angle is not centered, perform steering angle sensor calibration/relearn according to manufacturer procedure (many vehicles require special tool/scan tool).
  8. If calibration fails or signal remains out of range, substitute a known-good steering angle sensor (if serviceable) or replace the sensor/module; then perform required relearn procedures and clear codes.
  9. After repairs, road test and monitor live data and confirm no reoccurrence of C1122; document final readings and relearn status.

Likely causes

  • Damaged wiring harness in steering column (usual from wear or aftermarket accessories)
  • Water ingress or corrosion at sensor connector
  • Steering wheel removed/reinstalled without performing SAS calibration
  • Failed sensor due to internal electronics or magnet/encoder damage
  • Blown fuse or weak battery causing unstable reference voltage

Fault status

⚠️ Status
Steering Angle Sensor Circuit Range/Performance: control module detected sensor output outside expected range or inconsistent with vehicle dynamics. Affects ABS/ESC/traction and may require sensor wiring repair, sensor replacement, and steering angle recalibration.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-3.0 hours

Similar codes

C1118 C1120 C1121 C1135 C1111
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